Japanese engineer and certifiable genius Tomoto Shimizu Washio (hogehoge335 on Youtube) has, all on his own, proven the value of Microsoft's Kinect. In an explosion of brilliance, Washio has created a mod that turns users all Super-Saiyan like, and allows them to fire up Kamehameha blasts of varying power. Setting this up to work with one person is a feat, but he went on to create a multiplayer party mode version as well:
The guy also made a Kinect mod to trasform into Ultraman Seven. He's done all this for the world, and has yet to receive a Nobel prize. Amazing.
You can download the latest version of of this mod here, but be aware that it doesn't function with the recently released official Kinect SDK beta.