iView is taken.
iSee is already in use in multiple ways.
iMediaCenter already belongs to someone. Not that a name being trademarked/used by someone has made Apple pause for long.
How about iPad XXX Large, or iPad 42"?
Or iScreen - and you know the kiddy rhyme that will go along with it.
A variation on one used above - iTainment Center.
Probably they'll just stay with the brand name they've already built - Apple TV. Pragmatic, cheap, established - and it just works.