Yup, this is huge. Wayland gaming is now a possibility. With Explicit Sync (needed for NVIDIA users) and VRR, there's now no excuse to keep gaming in X11 in both DEs.
Yes, no VRR (by default anyway) was a mild inconvenience, but it doesn't exactly make games unplayable. It's not like everybody hated gaming before gsync/freesync became widespread.
For me, VRR is crucial as I play a lot of FPS games or else, I don't feel that the mouse is the extension of my hand. That's why I switched from Gnome to KDE.
I just play VR on Linux, don't really have many problems with it. Only small ones like sometimes SteamVR doesn't recognize my headset the first time I start it so I need to restart it once.
Yeah I have an Oculus Rift S and the hardware support is pretty bad and I haven't really gotten it to work. Obviously a vendor issue, and i don't see meta open sourcing or releasing any drivers for linux anytime soon.
Yeah, I have a Valve Index, which is officialy supported on Linux, so I don't have any issues in that regard. I think the only headsets that work well on Linux are the two with official support (HTC Vive and Valve Index) and the Quest headsets because of ALVR.
For some reason, on Linux, the GPU performance mode isn't set to high automatically. You can use CoreCTRL to manually set it to high. That eliminated those issues for me.