I have a smart TV not connected to the internet, just a HDMI connection to another box. Then I learned that IP-over-HDMI is a thing!
In the very near future this will be even more futile - the TV will have it’s own built-in cellular connection just for telemetry. Anyone who objects will be shouted down as a 5G conspiracy nut, but this is exactly what 5G is designed for.
But it will actually work better with 3/4G because 5Gs range is so short and it would be easy to block with just a little tinfoil.
Also, new IoT technologies use techniques allowing them to operate at a much weaker signal.
But you can always just destroy the antenna.
While it’s in the spec, I’m not aware of a single piece of consumer electronics that actually support it. The standard is an utter failure.
In HDMI 2.1 the wires previously used for Ethernet-over-HDMI are now used for eARC making these two features mutually exclusive.
AFAIU it has no TV tuner, so no air/cable/sat reception, while having full "smarts" with built-in internet and apps.
My next TV is going to be a dumb one with a bespoke HTPC...