Leap Motion


Researchers proposed sensors that can track a user's hands. For instance, the Leap Motion can interactively track both hands of a user by identifying the positions of finger tips and the palm center, and later computing finger joints using an inverse kinematics solver. Some car makers are already proposing a hand-tracking based alternative interaction modality in lieu of traditional touch screens devoted to managing infotainment functions. Similarly, some smart TVs let users control their choices with a set of gestures, thus replacing the traditional remote control.

https://www.youtube.com/watch?v=gby6hGZb3ww

https://www.leapmotion.com/solutions

References : 
                 https://www.leapmotion.com/product
                 http://www.computer.org/