Eurogamer managed to get their hands on Dropchord, the upcoming "rhythmic score action game" from the same people who brought you Kinect Party. The game is based off the Leap Motion Controller, which you can use without actually leaping. I'd tell the lazier among us to leap for joy at this revelation, but we're too lazy.
The article touches more on Leap than the actual game, but give it a read anyway, or watch a teaser for the game here.
Source: Eurogamer