A point brought up with Natal is that it wont work with FPS for instance because how would you shoot. Or people want a wheel to steer, people want to hold on to a sword.
So what would stop MS from starting to make some additional controllers that work with the Natal. Some of these can simply be props like the Wii Wheel that comes with Mario Kart Wii. Why not a gun prop that actually has a working trigger? For a sword my kids have about 15 light sabers including multiple ForceFx lightsabers. What is to stop us from using those as swords?
Its libraries that sell systems not a single game.








