I guess you have to deal with bad units and other stuff but just wondering.
I think people will have different ideas of "dumb". For example.
* A TV with only 1 input. If you want more inputs get an external switch etc...
* A TV with no audio. If you want audio use external speakers
* A TV with no remote. With the 2 things above all you need is on an off? And/Or maybe just support whatever the protocol is so that other devices can control it.
Just thinking out loud, I'm sure there's a big disagreement on what's the minimal features.