leo-j, stick this in your head: The PS3 and 360 haven't shown (or guaranteed) anything which is far above each other in terms of graphics.
The two systems have a substantially different architecture, so you will see games doing certain things better on one system than the other. What you probably won't see (according to me and many others) are games which, all things considered, are far above what the other platform can do.
I have yet to see a better looking 360 game than gears of war, and uncharted is already considered the best looking console game.
Also with the recent release of GEARS 2 video, it seems the only graphicle inhancement was more enemies on screen and better lighting than gears of war, which indicates that gears 2 has peaked the 360 interms of performence hence why we see no visual improvement from gears 1 to gears 2.
On the other hand, Uncharted which is techinically more impressive than GEARS 1, is inferior to a couple of games for consoles. These games are " MGS4, and KILLZONE 2". Killzone 2 shows everything that seemed to be impossible on the PS3 hardware and surpasses expectations, those that doubt it are blind to see the truth.