Fog Interface

http://eu.techcrunch.com/2011/11/23/move-over-kinect-%E2%80%94-displair-from-russia-is-a-gesture-interface-in-thin-air/

This is an interesting adaption of the kinect/gesture/minority report etc ideas.  I remember seeing fog screens in movies in the 80's but the combination of a gesture interface looks useful for low resolution input.