I honestly believe that this demo was only a marketing push for Crysis 2 on the 360. It's new to the console, and this is the best way to introduce the entire console to the game. Throw a demo up on the Marketplace, and if it's good, interest and sales SKYROCKET up for this game. They already know it'll do well on PC, but they need some way to reach out to the consoles and grab their attention. This is their way of doing it.
As for the PS3, who knows.
Also, given the time it is coming out and how long it's lasting, I wouldn't be surprised if, like BLoodyghost said, there was an all platform singleplayer demo to be released in the few weeks leading up to the release.
Just my thoughts.
THIS!!! I've been mentioning this quite a lot! Crytek & EA and only trying to promote the game on the 360 because Crysis is new to the 360 and has a HUGE community so its the best way to make the game known.
I also believe there will be a Single Player demo on ALL platforms. Crytek & EA must feel that they need to show the Multiplayer off to the 360 community to give it lasting appeal to them since it seems that Xbox 360 players love their Multiplayer FPS games.
