On a tangential note, I tested Pyrowave last night streaming from my CachyOS gaming PC to my ROG Ally (running CachyOS) connected to the TV; there's 2 network switches and about 50m of ethernet between them.

Lowering the stream resolution to 1440p (from 4k) I was able to get 1440p@120Hz flawlessly playing DOOM TDA, <1ms input latency according to the overlay and display latency in the ~17ms range.

It took 900Mb/s of network bandwidth to stream that, so very close to the limit of my 1Gb LAN and still not at the quality and frame rate I'd normally play.

Add WiFi or internet streaming into the mix, and we're going to have to take a significant hit in visual fidelity and frame rates on top of all of the other issues you mention with cloud gaming.