Personally I have good faith in Crytek, I think they will do a better job than most other multi-platform developers. They have ambitious talented coders.
Scans (good or bad) or screenshots only tell part of the story though, so IMO we need to really see this game in action. For example I think the character death sequences / most animations pretty much sucked in comparison to Killzone 2 with the original Crysis. Killzone 2 may also have an advantage with regard to atmospheric lighting and motion blur, we can't tell from looking at just screenshots or even tech demos.
Then you have art direction and directive talents, etc which may influence the final outcome of the gaming visuals (camera angles, lip sync, facial expressions, etc).
I don't think they will be able to truly make optimal usage of the PS3 though, as the game is not really designed around this platform. For example for taking optimal usage of Blu-Ray (like Uncharted 2's seamless streaming and high quality assets will probably still push further in this regard). Or the PS3 is technically far more capable to have more onscreen action and more complex environments than a XBox 360, but usually you can't really have two totally different versions in this regard (so the game design will likely be designed around the 360's abilities), etc.