Wave hand. Turn any surface into a touchscreen
New technology makes it possible to create touch-based interfaces almost at will, with just the swipe of your hand.
The system goes beyond previous work that allowed a depth camera system such as Kinect to be combined with a projector to turn almost any surface into a touchscreen.
The WorldKit system enables someone to rub the arm of a sofa to “paint” a remote control for the TV or swipe a hand across an office door to post a calendar from which subsequent users can “pull down” an extended version. These ad hoc interfaces can be moved, modified, or deleted with similar gestures, making them highly personalized. (via Futurity.org – Wave hand. Turn any surface into a touchscreen)