An attendee demos the Oculus Quest wireless virtual reality headset during Facebook Inc's F8 developers conference in San Jose, California, U.S., April 30, 2019. REUTERS/Stephen Lam 

An attendee demos the Oculus Quest wireless virtual reality headset during Facebook Inc's F8 developers conference in San Jose, California, U.S., April 30, 2019. REUTERS/Stephen Lam 

An attendee demos the Oculus Quest wireless virtual reality headset during Facebook Inc's F8 developers conference in San Jose, California, U.S., April 30, 2019. REUTERS/Stephen Lam 

Attendees demo Oculus Go virtual reality headsets during Facebook Inc's F8 developers conference in San Jose, California, U.S., April 30, 2019. REUTERS/Stephen Lam 

An attendee demos an Oculus Rift S virtual reality headset during Facebook Inc's F8 developers conference in San Jose, California, U.S., April 30, 2019. REUTERS/Stephen Lam 

Facebook CEO Mark Zuckerberg speaks about Oculus virtual reality headsets during his keynote at Facebook Inc's annual F8 developers conference in San Jose, California, U.S., April 30, 2019. REUTERS/Stephen Lam 

Danish Crown Princess Mary wears a Virtual Reality headset while participating in an interactive exhibit as she tours the South by Southwest (SXSW) conference and festivals in Austin, Texas, U.S., March 11, 2019. REUTERS/Sergio Flores 

Danish Crown Princess Mary wears a Virtual Reality headset while participating in an interactive exhibit as she tours the South by Southwest (SXSW) conference and festivals in Austin, Texas, U.S., March 11, 2019. REUTERS/Sergio Flores 

Danish Crown Princess Mary wears a Virtual Reality headset while participating in an interactive exhibit as she tours the South by Southwest (SXSW) conference and festivals in Austin, Texas, U.S., March 11, 2019. REUTERS/Sergio Flores 

Danish Crown Princess Mary wears a Virtual Reality headset while participating in an interactive exhibit as she tours the South by Southwest (SXSW) conference and festivals in Austin, Texas, U.S., March 11, 2019. REUTERS/Sergio Flores 

Visitors wearing virtual reality headsets take part in an activity at the exhibition section of the Cybertech 2019 conference in Tel Aviv, Israel January 29, 2019. REUTERS/Amir Cohen 

Visitors wearing virtual reality headsets take part in an activity at the exhibition section of the Cybertech 2019 conference in Tel Aviv, Israel January 29, 2019. REUTERS/Amir Cohen 

Attendees wear Oculus Rift headsets as they take a virtual reality drive in the Panasonic booth during the 2019 CES in Las Vegas, Nevada, U.S. January 9, 2019. REUTERS/Steve Marcus 

Russia's President Vladimir Putin adjusts his headset before the joint news conference with Argentina's President Mauricio Macri at the Casa Rosada Presidential Palace in Buenos Aires, Argentina December 1, 2018. REUTERS/Marcos Brindicci 

San Dar Nyunt Wai, Director of Operations at 360ed company, a Yangon based educational virtual and augmented reality company, demonstrates a VR headset at the company's office in Yangon, Myanmar October 26, 2018. Picture taken October 26, 2018. REUTERS/Ann Wang 

San Dar Nyunt Wai, Director of Operations at 360ed company, a Yangon based educational virtual and augmented reality company, demonstrates a VR headset at the company's office in Yangon, Myanmar October 26, 2018. Picture taken October 26, 2018. REUTERS/Ann Wang 

An employee of 360ed, a Yangon based educational virtual and augmented reality company, demonstrates a VR headset in Yangon, Myanmar October 26, 2018. Picture taken October 26, 2018. REUTERS/Ann Wang 

German Chancellor Angela Merkel adjusts her headset during a joint news conference with Israeli Prime Minister Benjamin Netanyahu in Jerusalem October 4, 2018. REUTERS/Ammar Awad 

Visitors use VR headsets at the State Hermitage Museum in Saint Petersburg, Russia, July 1, 2018. As well as shooting all the matches, Reuters photographers are producing pictures showing their own quirky view from the sidelines of the World Cup. REUTERS/Mariana Bazo 

An attendee uses a Virtual Reality (VR) headset at the World Nuclear Exhibition (WNE), the trade fair event for the global nuclear community in Villepinte near Paris, France, June 27, 2018. REUTERS/Benoit Tessier 

An attendee uses a Virtual Reality (VR) headset at the World Nuclear Exhibition (WNE), the trade fair event for the global nuclear community in Villepinte near Paris, France, June 27, 2018. REUTERS/Benoit Tessier 

An attendee uses a Virtual Reality (VR) headset at Orano stand during the World Nuclear Exhibition (WNE), the trade fair event for the global nuclear community in Villepinte near Paris, France, June 26, 2018. REUTERS/Benoit Tessier 

An attendee uses a Virtual Reality (VR) headset at Orano stand during the World Nuclear Exhibition (WNE), the trade fair event for the global nuclear community in Villepinte near Paris, France, June 26, 2018. REUTERS/Benoit Tessier 

French Finance Minister Bruno Le Maire holds a virtual reality headset during a visit of the new Qwant headquarters in Paris, France, June 14, 2018. REUTERS/Benoit Tessier 

Mounir Mahjoubi, French Junior Minister in Charge of Digital Sector, and French Finance Minister Bruno Le Maire wear virtual reality headsets during a visit of the new Qwant headquarters in Paris, France, June 14, 2018. REUTERS/Benoit Tessier 

Mounir Mahjoubi, French Junior Minister in Charge of Digital Sector, reacts as French Finance Minister Bruno Le Maire wears a virtual reality headset during a visit of the new Qwant headquarters in Paris, France, June 14, 2018. REUTERS/Benoit Tessier 

Mounir Mahjoubi, French Junior Minister in Charge of Digital Sector, and French Finance Minister Bruno Le Maire (R) wear virtual reality headsets during a visit of the new Qwant headquarters in Paris, France, June 14, 2018. REUTERS/Benoit Tessier 

Mounir Mahjoubi, French Junior Minister in Charge of Digital Sector, and French Finance Minister Bruno Le Maire (R) adjust virtual reality headsets during a visit of the new Qwant headquarters in Paris, France, June 14, 2018. REUTERS/Benoit Tessier 

A new VR headset is shown on display at E3, the world's largest video game industry convention in Los Angeles, California, U.S. June 12, 2018. REUTERS/Mike Blake 

A nurse treats a patient wearing the 3D therapeutic virtual reality headset developped by Healthy Mind start-up, at the emergency service department of the Saint-Joseph Hospital in Paris, France, June 7, 2018. The headset immerses the patient in the heart of a Zen garden or an enchanted forest to counter the pain rather than increase the doses of painkillers. Picture taken June 7, 2018. REUTERS/Philippe Wojazer 

A nurse treats a patient wearing the 3D therapeutic virtual reality headset developped by Healthy Mind start-up, at the emergency service department of the Saint-Joseph Hospital in Paris, France, June 7, 2018. The headset immerses the patient in the heart of a Zen garden or an enchanted forest to counter the pain rather than increase the doses of painkillers. Picture taken June 7, 2018. REUTERS/Philippe Wojazer 

A nurse treats a patient wearing the 3D therapeutic virtual reality headset developped by Healthy Mind start-up, at the emergency service department of the Saint-Joseph Hospital in Paris, France, June 7, 2018. The headset immerses the patient in the heart of a Zen garden or an enchanted forest to counter the pain rather than increase the doses of painkillers. Picture taken June 7, 2018. REUTERS/Philippe Wojazer 

The 3D therapeutic virtual reality headset developped by Healthy Mind start-up, is displayed at the emergency service department of the Saint-Joseph Hospital in Paris, France, June 7, 2018. The headset immerses the patient in the heart of a Zen garden or an enchanted forest to counter the pain rather than increase the doses of painkillers. Picture taken June 7, 2018. REUTERS/Philippe Wojazer 

A patient wears the 3D therapeutic virtual reality headset developped by Healthy Mind start-up, at the emergency service department of the Saint-Joseph Hospital in Paris, France, June 7, 2018. The headset immerses the patient in the heart of a Zen garden or an enchanted forest to counter the pain rather than increase the doses of painkillers. Picture taken June 7, 2018. REUTERS/Philippe Wojazer 

Doctor Olivier Ganansia, Emergency services head, holds the 3D therapeutic virtual reality headset developped by Healthy Mind start-up, during an interview at the Saint-Joseph Hospital in Paris, France, June 7, 2018. The headset immerses the patient in the heart of a Zen garden or an enchanted forest to counter the pain rather than increase the doses of painkillers. Picture taken June 7, 2018. REUTERS/Philippe Wojazer 

A nurse treats a patient wearing the 3D therapeutic virtual reality headset developped by Healthy Mind start-up, at the emergency department of the Saint-Joseph Hospital in Paris, France, June 7, 2018. The headset immerses the patient in the heart of a Zen garden or an enchanted forest to counter the pain rather than increase the doses of painkillers. Picture taken June 7, 2018. REUTERS/Philippe Wojazer 

A nurse treats a patient wearing the 3D therapeutic virtual reality headset developped by Healthy Mind start-up, at the emergency service department of the Saint-Joseph Hospital in Paris, France, June 7, 2018. The headset immerses the patient in the heart of a Zen garden or an enchanted forest to counter the pain rather than increase the doses of painkillers. Picture taken June 7, 2018. REUTERS/Philippe Wojazer 

The 3D therapeutic virtual reality headset developped by Healthy Mind start-up, is displayed at the emergency service department of the Saint-Joseph Hospital in Paris, France, June 7, 2018. The headset immerses the patient in the heart of a Zen garden or an enchanted forest to counter the pain rather than increase the doses of painkillers. Picture taken June 7, 2018. REUTERS/Philippe Wojazer 

Doctor Olivier Ganansia, Emergency service head, wears the 3D therapeutic virtual reality headset developped by Healthy Mind start-up, during an interview at the Saint-Joseph Hospital in Paris, France, June 7, 2018. The headset immerses the patient in the heart of a Zen garden or an enchanted forest to counter the pain rather than increase the doses of painkillers. Picture taken June 7, 2018 REUTERS/Philippe Wojazer 

Doctor Stephanie Marteau assists a patient wearing the 3D therapeutic virtual reality headset developped by Healthy Mind start-up, at the emergency department of the Saint-Joseph Hospital in Paris, France, June 7, 2018. The headset immerses the patient in the heart of a Zen garden or an enchanted forest to counter the pain rather than increase the doses of painkillers. Picture taken June 7, 2018. REUTERS/Philippe Wojazer 

Doctor Stephanie Marteau treats a patient wearing the 3D therapeutic virtual reality headset developped by Healthy Mind start-up, at the emergency department of the Saint-Joseph Hospital in Paris, France, June 7, 2018. The headset immerses the patient in the heart of a Zen garden or an enchanted forest to counter the pain rather than increase the doses of painkillers. Picture taken June 7, 2018. REUTERS/Philippe Wojazer 

Doctor Olivier Ganansia, Emergency service head, holds the 3D therapeutic virtual reality headset developped by Healthy Mind start-up, during an interview at the Saint-Joseph Hospital in Paris, France, June 7, 2018. The headset immerses the patient in the heart of a Zen garden or an enchanted forest to counter the pain rather than increase the doses of painkillers. Picture taken June 7, 2018. REUTERS/Philippe Wojazer 

A new Xiaomi VR headset is displayed during a product launch in Shenzhen, China May 31, 2018. REUTERS/Bobby Yip 

Xiaomi founder Lei Jun introduces a new VR headset during a product launch in Shenzhen, China May 31, 2018. REUTERS/Bobby Yip TPX IMAGES OF THE DAY 

A screen showing Facebook founder Mark Zuckerberg as Xiaomi founder Lei Jun introduces a new VR headset during a product launch in Shenzhen, China May 31, 2018. REUTERS/Bobby Yip 

Xiaomi founder Lei Jun holds a new VR headset during a product launch in Shenzhen, China May 31, 2018. REUTERS/Bobby Yip 

Xiaomi founder Lei Jun holds a new VR headset during a product launch in Shenzhen, China May 31, 2018. 

Xiaomi founder Lei Jun introduces a new VR headset during a product launch in Shenzhen, China May 31, 2018. REUTERS/Bobby Yip 

Visitors use Lenovo Daydream View VR headsets during the Viva Tech start-up and technology summit in Paris, France, May 25, 2018. REUTERS/Charles Platiau 

A visitor uses a Lenovo Daydream View VR headset during the Viva Tech start-up and technology summit in Paris, France, May 25, 2018. REUTERS/Charles Platiau 

An attendee uses a virtual reality headset during the annual Google I/O developers conference in Mountain View, California, May 8, 2018. REUTERS/ Stephen Lam 

71st Cannes Film Festival - Cannes, France. May 8, 2018 - A woman wears virtual reality (VR) headsets at a stand inside the Film Market business area. REUTERS/Regis Duvignau 

71st Cannes Film Festival - Cannes, France. May 8, 2018 - A woman wears virtual reality (VR) headsets at a stand inside the Film Market business area. REUTERS/Regis Duvignau 

71st Cannes Film Festival - Cannes, France. May 8, 2018 - A woman wears virtual reality (VR) headsets at a stand inside the Film Market business area. REUTERS/Regis Duvignau 

Attendees use Oculus Go virtual reality headsets during Facebook Inc's annual F8 developers conference in San Jose, California, U.S. May 1, 2018. REUTERS/Stephen Lam 

Attendees use Oculus Go virtual reality headsets during Facebook Inc's annual F8 developers conference in San Jose, California, U.S. May 1, 2018. REUTERS/Stephen Lam 

Attendees use an Oculus Go virtual reality headset during Facebook Inc's annual F8 developers conference in San Jose, California, U.S. May 1, 2018. REUTERS/Stephen Lam 

An attendee uses an Oculus Go virtual reality headset during Facebook Inc's annual F8 developers conference in San Jose, California, U.S. May 1, 2018. REUTERS/Stephen Lam 

An attendee uses a Facebook Spaces virtual reality app on an Oculus Go headset during Facebook Inc's annual F8 developers conference in San Jose, California, U.S. May 1, 2018. REUTERS/Stephen Lam 

Facebook Vice President of Virtual Reality Hugo Barra wears an Oculus headset at Facebook Inc's annual F8 developers conference in San Jose, California, U.S. May 1, 2018. REUTERS/Stephen Lam