Anyway, if it uses legs or feet position, the system loses 1:1 legs and feet tracking, if it uses hands, it loses 1:1 arms and hands tracking and, even worse, it loses the possibility to walk simultaneously with performing actions with your hands, if it uses a controller, it becomes quite like the Sony system, but overall, it looks like Wii's system is still the most versatile.
As Darth Tigris said, though, for dance games Natal will be the best system by far, I can't see Nintendo and Sony beating it if MS implements it right.







