if we're assuming PS4 will have Vita features, it has a better solution to updating games short of automatically updating games in the background like Steam. Vita tells you when there's a update and you can download it without launching the game. it's always annoying when I launch a game and get booted from xbl for a new update.
edit/tangent:
man, steam is awesome. I take it for granted. it automatically backs up my saves online so I can easily switch between laptop and desktop. a ton of stuff I want for these console interfaces exist on steam, like having your purchased but uninstalled games in one list. PS3 and 360 lump every purchase into your download list along with everything else, hidden away in the accounts menus. That's a reason I rarely uninstall games on PS3/360; I'll forget about owning Aegis Wing or Trash Panic.
