To prove my point, I'm going to post a link from a graphics comparison of Oblivion from April 2006, five months after the console's launch, between the 360 version and three PCs ( low end, mid range, high end). You both believe that the 360 at launch blew past midrange PCs and was more powerful than even expensive high-end machines. Let's see if that's true.
Trying to decide between the PC and Xbox 360 versions of The Elder Scrolls IV: Oblivion? We're here to help you make the best choice.
www.gamespot.com
It isn't. The Xbox 360 is competitive with midrange PCs of the previous year, as expected, and it falls behind against high end PCs, as expected.
My advice to everyone would be to make predictions and adjust expectations based on logic. Pricing, thermals, size, acoustics, these factors will always limit consoles against PCs. There's no getting around that.