Valve's Chet Faliszek has weighed in on Natal, and while he thinks it's "really cool", he is more concerned with the games that will be created for it.
"We [Valve] got to check it out, and it's actually really cool," he told D'toid. "Like, there's someone running around, jumping around and someone else walks up and it instantly recognizes this other person, splits them off and [they do] their own thing. There's a lot of coolness around it, but I'm not sure about the game that comes with that, and I'm not sure, personally, how much I wanna move around. I'm a lazy, lazy man. I don't want to move. I don't want to be fatigued playing a game.
"I think Wii hit it out of the park with the titles that it shipped with. I bought two Wiis, and they're both [for visiting] family, and playing. I can't seem to box them up and carry them, so I had to buy two. [Wii's launch titles] are perfect games for that ... I haven't found much else that's compelling.
"I want to see the compelling game first."
Half Life 2: Episode 3 using Natal to simulate a crowbar attack across the face of a hostile Combine - now that would be compelling.