For in game applications i still think the Sony wand seems to be the most useful one, the eye still tracks moment as seen in the video, not anywhere as good as Natal but it still knows where you are. The lights also help it to follow you as does the supposed ultra sound used also by the wand, all in its like across between the wii mote+ and some of the motion tracking in Natal, put an analogue stick on the top and i think id be happy with it as a main controller. With Natal its use for "normal" games seems a bit more limited in how it would work in them. How are you going to change weapons? how you going to reload do you want to be doing this for hours ? etc etc, same could be said with all the motion controls to some degree. I cant see the point of saying in people saying "its a revolution in game control as you are the controller" then say oh you need a controller to do this and that. One thing i thought would be cool at first would be say head tracking in a driving game but surely if you move your head to look over you shoulder or behind you wont see anything as your eyes are not on the screen? As an interface for an OS or casual games i dont think Natal can be beaten its looks very intuative and naturel, its also very cool tech much like touch screen was. I expect as im no games designer i cannot see the bigger picture in how Natal is such a huge benifit in gaming, but many thought that about the Wii. I still in the back of my mind see MS using this instead of there surface tech for future OS and this is a way for them to start to get people used to it.