i have a xbox 360 with a 250 gig hard drive. i can download over 500 games to the hard drive. which means i can play directly from the hard drive without swaping DVDs. that means i don't have to get up. and don't have to worry about damaging game DVDs. also don't have to be concern about damaging the DVD player. two DVD players stoped working because the tray got jammed.
right now i am downloading FO3. i allredy have the boxed version. yeah, it is a waste of money. but if i am playing skyrim and decide to play something less intense, i don't have to recall where i put those disks.