Crysis on consoles gets pretty big plus signs for being multi-platform and having a significant and rather cool creation and development environment behind it. It makes detailed comparison with a platform specific title almost pointless.
That said, I can't give any impressions personally because I checked yesterday, but the Crysis 2 demo doesn't seem to be available to me on Live.
You just used the magic word -multiplatform title-. I will explain myself better later.
I find Crysis 2 really exciting. For me it is better than many other games in every regard except overall prettiness. Note that I am talking here about a multiplayer map based on a beta demo, yet I still think it has spectacular graphics.
However, there are people who prefer exclusive titles. If exclusive games didn't get such high billing on "things to praise" list, some console gamers wouldn't have bothered.
If you consider that the reactions exclusive titles get are much more eloquent, despite they don't always look better than others or in some situations are in fact slightly worse, it might explain that some people aren't as excited as others about Crysis 2 and the such.
I think that a lot of it can be really normal. I understand them!! For multiplatform titles there isn't that urgent need to tell everybody how great it is or looks, there is simply an acceptance about how they are and how they look, and that's it.
It all comes down to individuals, There are too many pretty things in those exclusive games that they don't want to miss.... Sometimes though those opinions about exclusive make me want to buy, if only this forum were a podcast or something like that, some skullcandy earbuds that I'd wear, without even playing any music, and they would block out all the noise.
Objectively speaking, in this sense it always has been a lot easier to share opinions in PC forums, where most people are interested in the gameplay and the difference among specs rather than how a game is supposedly meant to run on better -specs aside-.
I like to be supportive of people's opinions but at times those opinions are clouded by platform myths.
Technically wise, my favourite exclusive titles are UC2, Halo Reach, LBP2 and I can't help it but feel some multiplatform titles can stand alongside the best exclusive games in the world.