I seriously doubt that Apple is going to get into the selling large screen tv thing. I know they make existing computer displays and some peripheral gear, and it's not an impossible stretch for them, but it's a big jump and I just really doubt it. Apple retail stores are already crowded, where would they put the things? Plus, the lighting in those places is very bright, not a good place at all to showcase a big tv screen (they have a smaller LCD in there now hooked up to demo Apple TV, it looks terrible). There's also a lot of stuff that Apple would have to learn to make one including all the advanced image processing that goes on inside the tv with custom chips, like deinterlacing, upconverting and downconverting, scan rate adjstment, 3D noise filtering, artifact reduction, station tuning and decoding, ambient light-sensing black levels, special processing for different inputs, and so forth.
I kind of doubt they've found a way to make a Blu-Ray that thin and at a price point small enough for a Mac Book as well. Would be great to see it if they have though.