LMAO I simply don't believe that Doom 3 was first being developed for the Xbox. Even if John Carmack himself told it to me I would not have believed him. I mean, Doom 3 was first shown at the presentation of the GeForce 3, the xbox was not even anounced at that time. And if it was, it wasnt at the point where the development of Doom 3 started, which was about 5 years ago.
And Doom 3 on the xbox looks like total crap (compared to PC version of course), u would have known if u had seen the screenies. The game looks better even on my GeForce 3 when I play @ 640x480 low quality with all advanced options turned off. I'm not kidding, I'm still having nightmares from when I first saw this xbox screenshot: