Well... tbh I'm still working on the build. But I don't do windows and I don't play FPS or anything where latency would be super important. I use VNC across town to my office and that's generally good enough... but we'll see. I had small hopes that "laptop as linux thin client" would have an easy PNP solution by now, but my research indicates that this still isn't the case. Definitely open to suggestions.
It's been a bit since I had a second device to try it with, but my experienced with Windows Remote Desktop have been less of a "this would be hard to game with" lag and more a "the delay in my mouse movement is making my head hurt" lag.