Like it being shadow-IT stuff?
I don't use my ISP's wifi crud hardware, no matter how hard they try to tout the 6G wifi with 4x4 mimo. I have my own docsis and my own wifi gear.
"smart" TV's had that all-in-1 benefit, but soon after entering my hulu acct info I started to see unknown devices using my acct. Using the streaming apps from my cableTV dvr box, and those on the Roku devices, I have not see that issue. As such I do not enter any credentials into any of my TV's.
I am sure some day the pixels themselves will be receivers of some sort, maybe lines with parallel IR receivers, it can then simply make an image from the IR hitting the screen from the room, a well hidden video cam even when the device is "off". How that data gets back to the C2 is perhaps just a minor technical issue. What if the TV could send out Rf that gets onto the house electrical wiring and then that gets filtered out by some other device and then sent back to C2. 100% plausible to accomplish.