Apple has been granted a U.S. Patent for a game-controlling 3D camera
On February 28, 2017, The U.S. Patent and Trademark Office officially published a series of 62 newly granted patents for Apple Inc. Our attention was focusing U.S. Patent 9,582,889 describing a technology acquired from PrimeSense about a 3D depth camera that could be used to control gameplay with gestures. A possible application is an automatic facial recognition, so sometimes you will be able to log to your iMac (or iPhone 8 ?) just looking at the screen, just the same "Windows Hello" way Microsoft announced for Windows 10.
Discover both sides of the 3D Recognition Force here under in video.
The iPhone8 Facial Recognition Rumor
Windows Hello Presentation