Yeah, and for us xbox owners, there would be a huge difference between downloading and buying (it could be the same for wii and ps2 people, i just dont own 1 so have no clue how their stuff works).

I know that with 360, you can download the demo and then later pay and have the whole game unlocked. I downloaded the demo, but have not paid for it, so it could be possible to check the difference between downloads and purchases also