The Crysis 2 PC demo will be available for download on March 1st.
[quote]The time has come for PC gamers to take their best shot in Crysis 2 multiplayer. Available for download at http://crysis.ea.com and other partner sites on March 1, the Crysis 2 multiplayer demo includes two stunning maps, two adrenaline-filled modes, and hours of multiplayer action.[/quote]
You realize you're playing an incomplete version of the game, right? Support for that stuff will almost definitely be added. The only PC game I've ever played that didn't allow the user to customize the graphics was prototype (i think?) might have been something else, but the it was definitely a straight up console port. Crytek wouldn't fuck over the PC fanbase like that, especially after going through the trouble to actually put out a PC demo... noone does that anymore.
The fact that you can't change anything is why I didn't wast my time and to be quite honest (Horrible) bandwidth downloading the leak. People call it "PC version" when they play it but in reality the graphics are DX9 and operating on basic settings.