Kinect + top-down projector = portable tangible computing!

'' Company uses Kinect to create a touchscreen out of any surface (w/ Video) '' [source]

'' Mobile Surface
It is a novel interaction system for mobile computing. Our goal is to bring Microsoft Surface experience to mobile scenarios, and more importantly, to enable 3D interaction with mobile devices. We do research on how to transform any surface (e.g., a coffee table or a piece of paper) to Mobile Surface with a mobile device and a camera-projector system. '' [source]

''  Audio d-touch is a collection of applications for real-time musical composition and performance, with very special user interfaces.  '' [source, build it!]

''Explay’s Tiny Projector Goes on Show'' [source] 

'' Cube Laser Virtual Keyboard for iPad & iPhone ...
The Future Has Arrived
Remember when you were promised all those amazing future tech innovations? '' [source]