How about controlling Windows 7 using Kinect? Yes, it has been made possible by the Evoluce software team that worked hard on multitouch and gesture control solutions supported by Microsoft.

Microsoft has helped in hacking Kinect to control Windows 7 Smiley

Multi-gesture and multi-user interaction unleashes exciting possibilities for a multitude of applications like gaming, consumer electronics, office, events, education, command and control, point of sale and medical systems. Soon you will plug in depth sensing devices like Kinect into your PC and you will start intuitive communication with your computer and other users.”

 More details at : Wolfgang Herfurtner  Multitouch and Gesture Computing Blog 

Also check - First Pictures of Gesture Control of Windows 7 with Depth Sensing Device

(Source :Microsoft helps in hacking Kinect to control Windows 7)