I'm not sure what you're getting at. I do know there's a big difference between google licensing their software to tv manufacturers and other devices which will simply have the added benefit of being internet capable which is what many sets have now but not-so-great software vs Apple's "reported" approach.
All manufacturers aside however - the point remains that people don't upgrade TVs at the same speed as phones, mp3 players, cd players, blu-ray players, etc.
So whatever winds up in the pipeline has either got to completely knock people's socks off - or it's going to be a slow(er) transition/adoption rate.
People in the television/video marketplace are and have been frustrated for awhile because of the hi def media wars, 3D and the like. Early adopters are early adopters - and devices when released will be bought. But Apple would really need to do something incredible for people to "forget" they just bought their big screen TVs, etc and buy something new/else.
or again - it will take much more time then say, the iPhone, to ever hit that kind of stride.