The rumours surrounding an Apple TV of some sort have started to pick up a little, ala the rumours of a iPad mini. They're going to do it eventually, whether it's any time soon is another story.
Anywho... If you do go for an LED TV (and they have their plus points - they tend to have slightly better picture quality than your basic LCD, and they're nicely slim) bear in mind a couple of things. First and most importantly, the speakers will be shite. They tend to be bad on any flat panel (good audio is rare) but LEDs are universally awful, they simply haven't got the space for a decent set in such a thin frame. And secondly, they often suffer from backlight bleed, which if you notice it can be annoying. In your price range you'll be looking at edge lit sets, which can be particularly bad for bleed. If you don't notice it, though, you won't care.