A lot of laptops don't have a graphic card that support pixel shaders, even brand new ones.
Make sure your PC matches the minimum hardware requirements before you buy. Especially the graphic card.
I have a GF4 Ti4800 in my cab, which is way overkill, but i least I should be able to play this game. I downloaded the demo when it came out, but uninstalled it promptly because I didn;t like hte controls for a PC game, but I hadn't thought of putting it on my cab. I agree that it's pretty perfect for a cab, and I just reserved a used copy by phone at my local computer store.