(edited to add) I feel like the real problem will be when they start adding wireless connectivity that you can't disable. I can keep my LG off the network today by refusing to configure networking for it. I can't do that if it doesn't use/require my network...
TV still works (minus the streaming services). If you try to open the network settings the screen just shows a loading icon indefinitely.
This gets raised all the time but I just don't see it being necessary - the vast majority is happy to voluntarily provide it with an internet connection. The ones like us who fight it is a very small minority not worth spending on including cellular modems (& the associated data plan) in every TV.