alt Hacker NewsI was under the impression that some of the anti-screen-tearing and other features in Wayland unavoidably set a higher (and, higher-enough to be noticeable in some contexts) floor on latency, though, because of how those features necessarily work. I don't mean drivers.
Variable Refresh Rate in Gnome. No screen tearing, no input latency hit for full screen games. To make this work correctly, I think regardless of OS, you need to cap the refresh rate to something just inside the max for the monitor. A lot of games these days have fps limiters. Let's say your monitor was 144hz. You'd want to cap fps to something like 140hz. That's going to prevent any screen jank or input latency.