The TrueDepth Camera is being marketed about reading faces, but at the foundation, it is just checking the depth of anything in front of the camera.
It would be awesome if developers get access to this raw data eventually or even get wrappers for some basic Leap Motion style guestures.
- New magic tricks just by waving your hand over the phone
- Teach sign language with accurate (and automated) tests
- Instead of tap to wake, just wave
- First person shooter using a hand gun (index finger to target, thumb to shoot)
On the security side, it'd be cool to implement a password using facial expressions. Two winks with the right eye to unlock. Frown to lock the phone out.