[imtringued]

We aren't talking about website loading speeds. This is about how quickly your mouse cursor moves in response to mouse movements and that latency needs to be 16ms or less.

Personally I can get latency down to 200ms over the internet into a remote datacenter with WebRTC. The challenge however in practice is that running a CPU without a GPU will eventually starve the CPU because it has to do intensive things like run a 1080p video at 60fps which aren't feasible on a CPU only machine. This CPU load will then slow down the video encoder and overall responsiveness (no, responsiveness doesn't mean a mobile layout here) of the remote desktop.