Great use of Kinect:

Chad Ruble’s mother suffers from aphasia due to a stroke. She hasn’t been able to use a keyboard for years because she is simply unable to recognize text. In order to help her, he built a Kinect-enabled interface that lets her move her hand around a series of simple icons – happy, sad, upset, etc. – and other icons that signify degree.

After swiping around the screen a bit, she was finally able to send an email using a few simple hand motions. She was overjoyed.

That is freaking fantastic. :)