You\'re not the first to make that comparison.
The EyeToy had some fun minigames with it that had the same effect as Wii. It was easy and fun enough that anyone would give it a try. But the device wasn\'t designed well enough to use a wide variety of software. Some developers tried with a Billy Hatcher game and a Nights game. (OK, I guess just Sega tried).
But holding your arms out gets tiring and the camera needed a freaking floodlight to detect a person. It was a cute idea, though, and maybe the PS3 EyeToy will improve on it. They\'ve got some wacky ideas for that thing that include using it to scan playing cards, which sounds too convoluted to be any fun.
Meanwhile, Microsoft\'s Xbox Live Vision Cam just uses your photo or a streaming image of the user (or whatever is in front of the camera) for games like Uno. This feature is typically naughty, from what I understand, heh.