Now this is cool. Using a standard electromyograph attached to the forearm, the geeks at Microsoft's Muscle-Computer Interface group set up Guitar Hero to react to the position and pressure of all five fingers.
How badass is this? In all honesty, overpriced toy instruments cluttering up my living room is one of the big reasons I almost never play Rock Band or Guitar Hero games anymore. This looks to solve that problem while also bringing all of my air guitar fantasies to life.