This exactly. Surely some sort of IoT mesh networking will allow exfiltration of data even without having configured your own device.

I'm hopeful that there will be sufficient distrust that "jailbreaking" or "rooting" TV controller boards will be turnkey enough to move to something like OpenWrt or GrapheneOS but for TVs.

>IoT mesh networking

I'll bet there is already a manufacturer whose TVs can all communicate intratelevisually (non-standard proprietary frequencies) – and then, if even one of them is online... they're all relaying within their private intra-TV spyware meshnets to their various relays.

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In unrelated news, my 2012 Sony Bravia is still fantastic, even if not for (4K) high-refresh games (the image quality remains fantastic for casual usage).