I have not studied the Xserver protocol so I am only speculating. I think it would work better on older GUI's that uses predefined UI components vs apps that treat the UI as a canvas and re-paints rather then reusing components. That said, when experimenting I have found it works on games too. But high latency (more then 1ms) will kill the experience, so slow radio like wifi or a mobile modem would not work. Its funny that we have made so many advances in network an compute, both in reduced latency and increased bandwidth/capacity, yet its all eaten up by consumer stack layers, like 10ms lost due to slow radio, and another 10ms putting the image on the screen, and maybe 1-5ms in software layers. And a keyboard or touchscreen with 100Hz poll rate.