All this mystery Apple television hype is pretty silly.
Apple today sells a state of the art 27" monitor, the Thunderbolt Display, for $999, with decent built in speakers. you don't need a tuner anymore, just add a few HDMI ports, wifi/ethernet, optical sound out, add an AppleTV chip, and give it a slick iOS UI via a Remote app for iDevices, and bingo, you have a beautiful top of the line 27" Apple Television.
yeah the price is high end. but Apple can probably begin it down quite a bit if it wants to, starting with the aluminum chassis. and there will need to be at least a bigger 47" model too.