Who ever said games never helped anybody.
Doctors are using the Xbox Kinect in order to create 3d scans for surgical robots. This technique usually costs around 50,000$, however doctors are getting practically the same results with a 150$ Kinect and a little hacked software.
Check the link for the full article.
Article: Turning Microsoft's $150 Kinect Into a $50,000 Piece of Surgical Equipment