A Samsung Galaxy S5 smartphone is held next to a logo of Apple in this September 23, 2014 illustration photo in Sarajevo. REUTERS/Dado Ruvic 

Apple CEO Tim Cook speaks during a presentation at Apple headquarters in Cupertino, California October 16, 2014. REUTERS/Robert Galbraith 

A model poses with a Olympus 'PEN E PL7' camera on the press day of the world's largest fair for imaging in Cologne September 15, 2014. More than 1,000 exhibitors from 51 countries will show their latest products at the Photokina 2014 from September 16-21. REUTERS/Ina Fassbender 

People try out Oculus VR's headset Oculus rift development kit 2 at its booth in Tokyo Game Show 2014 in Makuhari, east of Tokyo September 18, 2014. About 421 companies and organizations are participating in the Tokyo Games Show 2014, which will be held until September 21. REUTERS/Yuya Shino 

Devices produced by U.S. manufacturer of computer networking equipment Netgear are displayed on a web during the IFA Electronics show in Berlin September 4, 2014. REUTERS/Hannibal Hanschke 

An Apple Watch is shown on screen during an Apple event at the Flint Center in Cupertino, California, September 9, 2014. REUTERS/Stephen Lam REUTERS/Stephen Lam 

Electronic cables are silhouetted next to the logo of Facebook in this September 23, 2014 illustration photo in Sarajevo. REUTERS/Dado Ruvic 

An interface of FireChat is shown during an interview of Open Garden co-founder and CEO Micha Benoliel in Hong Kong October 2, 2014. The company makes FireChat, one of the most popular messaging apps being used by the "Occupy Central" civil disobedience movement to communicate and coordinate. The company says over 200,000 new users have downloaded the app in Hong Kong alone in the last two days. REUTERS/Bobby Yip 

Test person Niklas Thiel poses with an electroencephalography (EEG) cap which measures brain activity, at the Technische Universitaet Muenchen (TUM) in Garching near Munich September 9, 2014. The researchers from TUM and the Technische Universitaet Berlin (team Phypa) try to find ways to control an airplane with computer translated brain impulses without the pilot touching the plane's controls. The solution, if achieved, would contribute to greater flight safety and reduce pilots' workload. Picture taken September 9, 2014. REUTERS/Michaela Rehle 

Toshiba Corp. demonstrates its communications android named Ms. Aiko Chihira that can use sign language and introduce itself, at the Combined Exhibition of Advanced Technologies (CEATEC) JAPAN 2014 in Chiba, east of Tokyo, October 7, 2014. Over 500 companies and organisations are exhibiting at CEATEC JAPAN 2014, which will be held until October 11, 2014. REUTERS/Issei Kato 

Japan's Omron Corp. demonstrates a table tennis playing robot at CEATEC (Combined Exhibition of Advanced Technologies) JAPAN 2014 in Chiba, east of Tokyo, October 7, 2014. Over 500 companies and organisations are exhibiting at CEATEC JAPAN 2014, which will be held until October 11, 2014. REUTERS/Issei Kato 

Spanish actor Antonio Banderas embraces a robot used in the film Automata during a photocall on the third day of the 62nd San Sebastian Film Festival, September 21, 2014. Banderas stars in and produced the science fiction film, which is part of the festival's official section. REUTERS/Vincent West 

The new HTC desire eye smartphone (L) and RE camera are seen on display after their launch in New York October 8, 2014. REUTERS/Eduardo Munoz 

New Amazon Kindle Fire HDX 8.9 Tablets are displayed during a launch event in New York September 17, 2014. REUTERS/Brendan McDermid 

A 1960's era Dick Tracy wrist radio is seen in District Heights, Maryland September 8, 2014. With the expected release this week of the Apple iWatch, which would be the company?s first new product since 2010, Tracy's two-way wrist radio from the 1940's could be seen by some as a predecessor to today's smartwatch. Tracy wrist radio courtesy of the National Law Enforcement Museum. REUTERS/Gary Cameron 

A visitor checks a Panasonic interactive mirror concept during the IFA Electronics show in Berlin September 4, 2014. REUTERS/Hannibal Hanschke 

Television presenter Rachel Riley tries the new Samsung Gear VR device at the Unpacked 2014 Episode 2 event ahead of the IFA Electronics show in Berlin, September 3, 2014. REUTERS/Hannibal Hanschke 

A spine model implanted with a 3D-printed artificial axis is displayed at Peking University Third Hospital in Beijing, August 14, 2014. Chinese doctor Liu Zhongjun has successfully implanted an artificial axis produced by a 3D printer into the spine of a bone cancer patient. This was the first time that an axis produced by 3D printing had been implanted into a patient, according to Liu. Normally, a diseased axis would be replaced by a standardised, hollow titanium tube, said Liu. Picture taken August 14, 2014. REUTERS/Jason Lee 

An iPhone 6 phone is seen on display at the Fifth Avenue Apple store on the first day of sales in Manhattan, New York September 19, 2014. Apple Inc's latest phone lured throngs of gadget lovers, entrepreneurs and early adapters to its stores in New York, San Francisco and other cities around the world in the latest sign of strong initial demand for the new, larger generation of iPhones. REUTERS/Adrees Latif