Motion sensors with true accuracy are probably still a few years away before they are more than just gimmicks in games, but it would be interesting if you could "interact" with the game with your hands, too, while seeing the virtual weapon that you have through Oculus, in your hands, and using it would be so accurate that it wouldn't feel disconnected from that "real" virtual reality you're in through Oculus. You'd actually feel as if you're fighting with a sword and killing that monster in front of you with it, even though you wouldn't have anything in your hand in the real world.