aha, but if you put a new 200€ videocard in a 2 year old system, no way that you can run crysis just as nice as halo 3 on a Xbox360 (perhaps just as good as Halo 2, I don't know, never played halo 2 or 3). Thinking about it more, I think you are probably right, and the total amount of money out in both systems doesn't differ much in the long run.
But this is the case for FPS games, and as far as I know Larian isn't making a FPS.