Well to be fair forza 3 runs in 720p upscaled to 1080p and which makes makes the pixels BIGGER on your xbox while GT5 runs in true 1080p, so as far as defending the the graphics you're not going to fool anyone :)
Forza 3 has much, much better graphics than GT5, let alone GT PSP. Although in many ways GT PSP does look better than GT5 (what little true, non prerendered GT5 footage Sony has released looks quite bad)
That is why Sony does not release any real pictures of GT5 either, only 3000X2000 "bullshots" with extreme AA and motion blur added.
How are you gonna judge a photo??? I went to the TGS and I played GT5 and Forza 3, I played almost everything I can get my hands on. I'll tell you this now, GT5 is better, the GT psp (What did you expect???? its a PSP)
if you honestly think gtpsp looks better than forza3 then you seriously need a boot in the ass, that video is poorly done to make the comparisons worthless. i could just as well put gt3 next to gt5p in low resolution and say they look identical, you're just manipulating the assets to try to reassure yourself that you made the right purchase.
It's true. You're comparing apples and oranges. Not to mention PSP has it's own screen and you can use any screen with the Xbox. Even if you could say the graphics were better which is an absurd statement to begin with, they aren't in the same class. The 360 is essentially a full sized computer which only plays video games (and other media). Whereas the PSP is a mini replica of a PS2 (from what I understand) and built mainly for portability. So the argument is quite moot.
I play gt3 and forza3 and both are bad ass games. I am not biased because I have both consoles psp and xbox360. Forza3 right now is in the lead as far as graphics and game play is concerned but what about when gt5 comes out? I have no doubt that gt5 will dominate forza3 it's always been that way for auto racing gt versions have always ruled.