Well I know, but I was just wondering why people would be interested in general, not knocking a platform or a specific game.
If GTA didn't sell out, I am not sure what would other than things that are produced with hardware and therefore have a smaller quantitiy available normally (Rock Band, Guitar Hero).
I preordered MGS kind of as an impulse buy, and to try the online beta (which was bleh) but in the absence of an incentive why preorder?