It would have to be a pretty amazing television to support the high profit margins Apple is accustomed to. It's a very crowded field with established players. The last 'amazing' television was the Kuro and people were not willing to pay the premium.
If amazing means gesturing towards the tv, Microsoft probably has a leg up with Kinect.
I don't see Apple doing this, but Netflix or Prime plus Aereo would be an amazing alternative to cable/satellite -- finally realize the potential of internet tv.