Apple CEO Tim Cook speaks during an Apple event announcing the iPhone 6 and the Apple Watch at the Flint Center in Cupertino, California, September 9, 2014. REUTERS/Stephen Lam (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY) 

Apple CEO Tim Cook speaks about the Apple Watch during an Apple event at the Flint Center in Cupertino, California, September 9, 2014. REUTERS/Stephen Lam (United States - Tags: SCIENCE TECHNOLOGY BUSINESS TPX IMAGES OF THE DAY) 

The new Apple Watch is pictured during an Apple event at the Flint Center for the Performing Arts in Cupertino, California, September 9, 2014. Apple Inc unveiled a watch, two larger iPhones and a mobile payments service on Tuesday as Chief Executive Officer Tim Cook seeks to revive the technology company's reputation as a wellspring of innovation. REUTERS/Stephen Lam (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY) 

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 (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY TPX IMAGES OF THE DAY) 

A demo smartwatch is displayed at the Google I/O developers conference in San Francisco June 25, 2014. Picture taken June 25, 2014. REUTERS/Elijah Nouvelage (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY) 

A visitor holds a Samsung Gear S smartwatch at the IFA consumer technology fair in Berlin, September 5, 2014. REUTERS/Fabrizio Bensch (GERMANY - Tags: BUSINESS SCIENCE TECHNOLOGY)

Samsung's new Gear S smartwatch is pictured after its presentation at the Unpacked 2014 Episode 2 event ahead of the IFA Electronics show in Berlin, September 3, 2014. REUTERS/Hannibal Hanschke (GERMANY - Tags: BUSINESS SOCIETY SCIENCE TECHNOLOGY)

A Google employee demonstrates the features of the Moto smartwatch at the Google I/O developers conference in San Francisco June 25, 2014. Google Inc's Android software is coming to cars, televisions and watches this year, as the Internet search giant races against Apple Inc and other tech companies to extend its business into a rapidly broadening field of Internet-connected devices. REUTERS/Elijah Nouvelage (UNITED STATES - Tags: SCIENCE TECHNOLOGY BUSINESS) 

Google employees show off the two different colors of the Moto smartwatch at the Google I/O developers conference in San Francisco June 25, 2014. The round smartwatch will be released in the coming months. REUTERS/Elijah Nouvelage (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY) 

An attendee plays with a demo LG G smartwatch on display at the Google I/O developers conference in San Francisco June 25, 2014. REUTERS/Elijah Nouvelage (UNITED STATES - Tags: SCIENCE TECHNOLOGY BUSINESS SOCIETY) 

An LG G Watch R smartwatch is presented at the IFA consumer technology fair in Berlin, September 5, 2014. REUTERS/Fabrizio Bensch (GERMANY - Tags: BUSINESS SCIENCE TECHNOLOGY)

Samsung's new Gear S smartwatch decorated by Swarovski is seen after a presentation at the Unpacked 2014 Episode 2 event ahead of the IFA Electronics show in Berlin, September 3, 2014. REUTERS/Hannibal Hanschke (GERMANY - Tags: BUSINESS SOCIETY SCIENCE TECHNOLOGY)

An employee holds an LG G Watch R smartwatch with a circular screen during the IFA Electronics show in Berlin September 4, 2014. REUTERS/Hannibal Hanschke (GERMANY - Tags: BUSINESS SCIENCE TECHNOLOGY)

An employee holds an LG G Watch R smartwatch with a circular screen during the IFA Electronics show in Berlin September 4, 2014. REUTERS/Hannibal Hanschke (GERMANY - Tags: BUSINESS SCIENCE TECHNOLOGY)

LG G Watch R smartwatches are seen at the IFA consumer technology fair in Berlin, September 5, 2014. REUTERS/Fabrizio Bensch (GERMANY - Tags: BUSINESS SCIENCE TECHNOLOGY)

A GoalControl watch reads "goal" as a football rolls fully behind the goal line during a demonstration in the western German city of Aachen May 28, 2014. German firm GoalControl has been appointed by FIFA as the official provider for the goal-line technology (GLT) at the upcoming 2014 soccer World Cup in Brazil. GoalControl uses 14 high-speed cameras around the pitch as part of its GoalControl-4D system, which are fixed in elevated positions around each goalmouth. The ball's position is continuously captured in three dimensions - X, Y and Z coordinates. All the cameras are linked to a computer processing system, which filters out players, the referee and any other objects. Only the ball remains, with its position precise to a few millimetres in the coordinate system of the pitch, according to the GoalControl website. The watch will be worn by referees and will display the word "goal" together with a vibration alert within one second, if the ball has fully crossed the goal line. REUTERS/Wolfgang Rattay (GERMANY - Tags: SPORT SOCCER WORLD CUP SCIENCE TECHNOLOGY) 

An Armatix employee holds a smart gun by the company at the Armatix headquarters in Munich May 14, 2014. The gun is implanted with an electronic chip that allows it to be fired only if the shooter is wearing a watch that communicates with it through a radio signal. If the gun is moved more than 10 inches (25 cm) from the watch, it will not fire. A Maryland gun shop owner has dropped his plan to be the first in the United States to sell the so-called "smart gun" after a backlash that included death threats. REUTERS/Michael Dalder (GERMANY - Tags: CRIME LAW POLITICS SCIENCE TECHNOLOGY BUSINESS) 

New Samsung Gear 2 smartwatch is seen on a display at the Mobile World Congress in Barcelona February 23, 2014. Samsung Electronics unveiled a new smart watch and fitness band along with the latest version of its flagship Galaxy smartphone on Monday, demonstrating how the battleground for innovation is shifting from the hand to the wrist. Picture taken on February 23. REUTERS/Albert Gea (SPAIN - Tags: BUSINESS TELECOMS) 

The new Samsung Gear 2 smartwatch is displayed at the Mobile World Congress in Barcelona February 23, 2014. Samsung Electronics unveiled a new smart watch and fitness band along with the latest version of its flagship Galaxy smartphone on Monday, demonstrating how the battleground for innovation is shifting from the hand to the wrist. Picture taken on February 23. REUTERS/Albert Gea (SPAIN - Tags: BUSINESS TELECOMS) 

KMS Wristband phones for young children and the elderly are displayed during the 2014 International Consumer Electronics Show (CES) in Las Vegas, Nevada, January 8, 2014. The wrist phone by British-based KMS Solutions will consecutively dial up to 5 phone numbers at the touch of the one button until there is an answer. The phone can also send an alert if the wearer has left a pre-described area. REUTERS/Steve Marcus (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY) 

The ZTE Blue Watch wearable computer and camera device is shown at the annual Consumer Electronics Show (CES) in Las Vegas, Nevada January 8, 2014. REUTERS/Robert Galbraith (UNITED STATES - Tags: SCIENCE TECHNOLOGY BUSINESS) 

A Sony SmartWatch 2 is pictured at the Sony booth during a media preview day at the IFA consumer electronics fair in Berlin, September 5, 2013. The IFA consumer electronics and home appliances fair will open its doors to the public from September 6 till 11 in the German capital. REUTERS/Fabrizio Bensch (GERMANY - Tags: SCIENCE TECHNOLOGY BUSINESS) 

A model poses with a Sony SmartWatch 2 at the Sony booth during a media preview day at the IFA consumer electronics fair in Berlin, September 5, 2013. The IFA consumer electronics and home appliances fair will open its doors to the public from September 6 till 11 in the German capital. REUTERS/Fabrizio Bensch (GERMANY - Tags: SCIENCE TECHNOLOGY BUSINESS) 

Shin Jong-kyun, President and CEO, head of IT and Mobile Communication division of Samsung presents the Samsung Galaxy Gear smartwatch during its launch at the 'Samsung UNPACKED 2013 Episode 2' at the IFA consumer electronics fair in Berlin, September 4, 2013. The IFA consumer electronics and home appliances fair will open its doors to the public from September 6 till 11 in the German capital. REUTERS/Fabrizio Bensch (GERMANY - Tags: BUSINESS TELECOMS SCIENCE TECHNOLOGY)

A Motorola MOTOACTV fitness device is displayed during the 2012 International Consumer Electronics Show (CES) in Las Vegas, Nevada, January 12, 2012. The device wirelessly communicates with headphones, heart monitors and smartphones and the music player determines which songs improve your performance, a representative said. REUTERS/Steve Marcus (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY) 

A journalist tries on a Samsung Galaxy Gear smartwatch next to his own watch, after the launch of the smartwatch at the IFA consumer electronics fair in Berlin, September 4, 2013. The IFA consumer electronics and home appliances fair will open its doors to the public from September 6 till 11 in the German capital. REUTERS/Fabrizio Bensch (GERMANY - Tags: BUSINESS TELECOMS SCIENCE TECHNOLOGY)

Woo Paik, President and Chief Technology Officer of LG Electronics Inc, officially unveils the world's first market-ready Touch Watch Phone (Model: LG-GD910) with 3G video telephony service and GSM quadband network capabilities at the annual Consumer Electronics Show (CES) in Las Vegas, Nevada January 7, 2009. The phone features a Flash interface, MP3 player, voice calling, text messaging and text to speech. The phone is set to go on sale in Europe sometime in 2009. The head of LG Electronics Inc U.S. Operations Michael Ahn said that while 2009 will be tough, the consumer electronics maker has no plans to cut spending on new products, citing the need to spur innovation. REUTERS/Rick Wilking (UNITED STATES) 

A Samsung Galaxy Gear smartwatch is pictured after its launch during an event at the IFA consumer electronics fair in Berlin, September 4, 2013. Samsung Electronics Co Ltd unveiled a smartwatch on Wednesday that works as an accessory to its market-leading Galaxy smartphones, with a small screen offering basic functions like photos, hands-free calls and instant messaging. REUTERS/Fabrizio Bensch (GERMANY - Tags: BUSINESS TELECOMS SCIENCE TECHNOLOGY) 

Pranav Mistry, head of the think tank team, Samsung Research America presents the Samsung Galaxy Gear smartwatch during its launch at the 'Samsung UNPACKED 2013 Episode 2' at the IFA consumer electronics fair in Berlin, September 4, 2013. The IFA consumer electronics and home appliances fair will open its doors to the public from September 6 till 11 in the German capital. REUTERS/Fabrizio Bensch (GERMANY - Tags: BUSINESS TELECOMS SCIENCE TECHNOLOGY)

A phone watch by LG Electronics is displayed during the 2009 International Consumer Electronics Show (CES) in Las Vegas, Nevada January 9, 2009. The phone features voice dialling capability, a touch screen and text-to-speech technology. It is expected to be introduced in Europe in the second half of 2009. REUTERS/Steve Marcus (UNITED STATES) 

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 Watch, 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 (UNITED STATES - Tags: SCIENCE TECHNOLOGY BUSINESS TPX IMAGES OF THE DAY)