Here comes the cell phone by Samsung, this device has a system which responds to a users gestures. It doesn't do this on the display as how the iPhone currently does, but as recognized in the space around the handset courtesy of the handset's front-mounted camera. The pre-loaded software will recognize preset motions, translating them into on-screen control. Take for example, pointing at the display and moving the finger to control a mouse/cursor whilst rotating the wrist with the hand outstretched in order to flip an image or layer.

No idea when this will be implemented in future handsets (if ever), but it would be interesting to see folks start waving their hands in front of phones in the near future. It's almost as wacky as screaming "Objection!" to your DS' microphone while on the train. Sound great, huh.