My Sony TV and Apple TV do not support it. According to stack exchange nobody really supports it, although I can’t attest to the commenters credibility.[1]

A quick google search doesn’t show any Sony TV with this capability.

Can you give me an example of any consumer TV that supports Ethernet over HDMI?

[1] https://apple.stackexchange.com/questions/325215/appletv-eth...

That means the PC, console, etc would have to voluntarily act as a network gateway for the TV. I've never heard of a device configured that way by default. Even if I wanted to do that, I don't know how I'd begin to enable it on anything other than a Linux box.

I had been wondering if the comcast boxes would be providing this as a side door. (hdmi from tv going to cable box, cable box has net access )

When I asked about data sharing with these dvr boxes and the new streaming stick option, only thing they could tell me is that 'virtually all video decoding and streaming devices are sharing data with multiple third parties'

I returned the dvr box, and have not chosen to use their new streaming stick.

You're not suggesting some grand conspiracy of smart TV and computer/console manufacturers, I hope? As far as I know, PC GPUs don't support this anyway.