We should know about central vac, too, and I'm deficient there as well. Ditto on most things about video and audio for that matter. OMG, don't ask me anything about HDMI. I'm particularly week on networking. I always forget what an Ohm is. Also, I barely use apps. Unfortunately, that means I have to ask a lot of questions.

Anyway, just trying to think of what might be missed if the TV weren't connected to the LAN (why would you ever connect to a WAN?).

IP control, for one. Auto updates? (We know the peril of that, but you'll have to connect at least briefly for vetted updates.) What else?