It's pretty consistently been shown that this just can't provide low-enough latency for gamers to be comfortable with it. Every attempt at providing this has experience has failed. There's few games where this can even theoretically be viable.

The economics of it also have issues, as now you have to run a bunch more datacenters full of GPUs, and with an inconsistent usage curve leaving a bunch of them being left idle at any given time. You'd have to charge a subscription to justify that, which the market would not accept.