Why Apple Hasn't Shipped a Full TV. Hint: 12x12
jonathansteiman.com
jonathansteiman.com
What in the wide, wide world of sports indicates that Apple will or would introduce a line of 15 TVs? Assuming they ever do enter the market, there will be exactly one model (edited to add: including a good, better, best within the model). Maybe more models and sizes later, but there will be only one to start.
There has to be a sweet spot for TV sales these days (32"? 37"?) and that's all they need to do. You then update the ATV puck to have the same internals and let customers know if they want a larger set, buy it on their own and use the puck.
Also, this is their first product that would be primarily wall mounted. Not needing space for peripherals would open up new display options -- like sticking them on a wall.
Also, this post assumes that Apple will make TVs 'ranging from 27 to 60 inches', which seems very un-Apple, at best.