The new Kinect game console addition to Xbox has been used for a lot of different art works, including this; from JoyStiq:
1n0ut, an artist collective specializing in multimedia performance-based art, has created a Kinect hack both beautiful and inspiring to behold. Titled "Versus," it sees a real-life dancer giving lessons to a digital model. Just imagine: Here’s a future where we can teach our computers how to Dougie.
Continue on to JoyStiq see the video