I want the game as well. I can't spend that much money on a game right now though, especially one that I'm not even sure will work on my operating system.
Um, did you not see my reply to your post asking if Tron 2.0 would work on Vista? The answer is yes. Don't worry about it. It works.
Unless maybe you own a really old
desktop or laptop with an integrated graphics chip. But then it wouldn't work, no matter what version of Windows you have. (If Vista came with the computer, then it's going to be a relatively new one.)