Gestural 3D Printing

Really, the best description is the video:
http://www.youtube.com/watch?v=BRJY927raTo

Also on my website:
http://eclecti.cc/computervision/gestural-printing-jumping-the-shark-on-kinect-hacks

We’ve seen a seemingly endless array of amazing Kinect hacks over the last few months, from superhero generators to obstacle avoiding quadcopters. However, it was only a matter of time before someone came up with a hack so inane and irrelevant that it would bring shame to the entire hobby. That time is now, and that someone is me. I bring to you, gestural 3D printing! Using the Kinect to track your hand, you can draw one layer at a time, with the printer following your every move. Pushing forward extrudes plastic, while pulling your hand back will start a new layer. Who needs difficult and confusing CAD software when you can just directly draw the object you want to print?