Since we're learning lessons:
If you are console graphics HD whore then you need to be on PS3, it's that simple.
If you're into the well rounded game with graphics having a place in overall quality but not being THE thing that really matters, then chose the system with the library of games you most prefer. If you chose the one with the lower graphical capabilities then don't get into any graphics pissing contests and be content with the system you've got.
We've got a few 360 exclusive games not based on the Unreal Engine still to come in 2010, and we have Crysis 2. If these games don't take the graphics crown off the PS3 exclusives (or in the case of Crysis 2 the 360 version specifically takes the crown) then I think console graphical prowess this generation is a settled matter. So, if this turns out to be the case, I vote any thread along the lines of "OMG best console graphics ever!!!" for a 360 game from 2011 onwards should be auto-locked unless there are actual reviews published that give such a game 10's for visuals and make that kind of statement.
And given the PS3 will (presumably) be established as the console graphics power for the gen, any OMG console graphics threads for PS3 games should be "OMG! best PS3 graphics ever". There's just nothing but trolling in rubbing graphics superiority in the faces of 360 fans. Saying best PS3 graphics ever will of course mean best console graphics by definition, it's just a more dimplomatic way of putting it.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix