Existing LTE is fine. If they wanted to embed modems in the TVs they could do it now. I'm guessing they simply don't have to, simply because a huge number of consumers will dutifully hand over their Wi-Fi passwords.

This is exactly the situation we're in with new automobiles...

While this is certainly possible, I’d imagine this sort of thing would be found quite quickly and would result in a massive lawsuit if not disclosed on the package.