No sorry jumped in without thinking properly, I was mainly talking about PC games, which really are as easy as download and double click. Downloading and playing console games is a fairly elaborate process, and probably doesn't apply to many people. So yeah, for the purposes of GTA discussion you can ignore all that.
Not sure the music industry can blame their problems entirely on p2p though, much as they would like to. (off topic I know)
Oh and about the football games etc, I'm not trying to be funny, is the difference player / team stats or something along those lines? I really don't know, but that would seem most likely. Surely that's a tiny downloadable update, not a compelling reason to shell out another £40 for a new game / disc?