Usually, if it's not groundbreaking, Apple doesn't bother. I don't know if Apple will make a TV. But, if it does, it will not be like anything Samsung (or anyone else) makes today. It will be groundbreaking.
It might happen if Apple makes 7" iPads and sells a large number of them. I can see a parallel with MP3 market where iPod plus iPod Nano has pretty much occupied the market, without too much sacrifice in profit margin.
But, on the other hand, the total number of pixels would be quadrupled when linear density is doubled. This puts a lot of pressure on the GPU.
I wonder what will be delivered via AirPlay. Would it go 1080i or 1080p?