I think that our technology is not at the level where we can 'adequately' put ourselves 'into' games in the manner which Project Natal appears to intend. It depends on how well it is implemented... it will either be a wii-level joke, or something actually worth using in games (though to what extent is up for questioning). Frankly, I'm a joystick woman, and movement controls: DO NOT WANT.
Please give me a home where cloud buffalo roam
Where the dear and the strangers can play
Where sometimes is heard a discouraging word
But the skies are not stormy all day