As for touchpad gestures, both GNOME and KDE have 1:1 gestures if you are running a Wayland session. If you are not running Wayland, you can install something like Touchegg or use another distro with built-in gestures. Linux Mint and Elementary OS both have great gesture support.
Hardware acceleration works great! Before I switched, Firefox didn't have it and in Chromium, you needed to turn on an experimental flag.
I can't comment on fractional scaling because I use two 24", 1080p monitors.
