Holy fucking crap.
I just tried this thing out, and FUCK ME IT'S LIKE I'M PLAYING A GAME FROM THE FUTURE.
It looks NOTHING LIKE Crysis on "normal" 'high'. It looks fucking amazing. I'm playing the "very high" preset you made on the following system:
AMD Dual Core 4200+
2 gigs ram
(single) 8800 GT 512 (slightly overclocked).
And the game is ACTUALLY PLAYABLE.
Before this config, the game was also playable, but only on vanilla "high". This looks fucking amazing.
For some reason though, AA on 2x is fine, but as soon as I put it on 4x, I get about 2 FPS. Weird. (1280x1024)
I just took these two screens:

"If you want a vision of the future, imagine SecuROM slapping your face with its dick -- forever." -George Orwell