Ok but if the tv has no internet access what is the smart tv going to do with all these nice screenshots? First rule: never provide Internet access to your smart tv.
There was some talk lower in the thread about devices being able to form mesh-networks with other devices that do have internet connection (for ex. your neighbour) and share data that way, there hasn't been any links or sources to the claims yet however
I mean, I remember people saying similar things about Google scanning Wi-Fi SSIDs to track their location. There was a point in time where people were saying that was conspiracy theory thinking.