Most people put our ability to perceive network lag at 100-150ms. Human perceptual limits in vision is around 13ms, but that’s not exactly what we’re talking about here. 50ms is very very playable in networked games, I wouldn’t notice personally until 120ms.

50ms works for network games when the input update loop is done locally, and with lots of fancy techniques to correct for the network lag.

50ms of input lag on the other hand is very easily noticeable. And makes games unplayable for lots of people.

I think a problem with cloud gaming is that companies are being very secretive about where they have compute resources. Which I think is the wrong approach. they should partner with Comcast and say Atlanta is a Geforce Now hub. If someone is too far, they should just not let them access the service.