https://www.blurbusters.com/blur-busters-lagless-raster-follower-algorithm-for-emulator-developers/ https://www.blurbusters.com/blur-busters-lagless-raster-foll

https://www.blurbusters.com/blur-busters-lagless-raster-follower-algorithm-for-emulator-developers/ https://www.blurbusters.com/blur-busters-lagless-raster-foll... is pretty good starting point. The whole website is dedicated to low latency and high refresh rate graphics, with plenty of indepth information. As far as I can tell, PCs should be capable of single-digit millisecond end-to-end latencies with the right hardware (display and input devices) as long as you can afford to burn cpu cycles on your drawing routine.