Desktop-Cube VS ALVR

I think many people know this. Also, the very first sentence in the extension's README says that it's inspired by Compiz.

There's a very weird long-standing issue on that. It does happen only on specific hardware/driver setups and only on X11: https://github.com/Schneegans/Desktop-Cube/issues/3

Some of it is still there: https://github.com/Schneegans/Desktop-Cube

Currently, I am using this and that icon, but yours look way better!

Desktop Cube (Cube workspaces switching animation): https://github.com/Schneegans/Desktop-Cube

https://github.com/alvr-org/alvr

They also achieve very low latency, I didn't follow every single optimization they added but it basically boils down to a few encoding tricks (better image in the center, accept blurriness in the peripheral vision), good network infrastructure, and hardware decoding / encoding being really fast.

To use steamvr on flatpak I used this tutorial . There was a disclaimer that nvidia GPUs are not supported, but the guy that suggested it has a 3090, so it might work for me too.

They have a Wiki page on GitHub with a settings tutorial and troubleshooting. A downside with a lot of open-source software is that it's relatively difficult to setup but it might fix some of your issues.

You can play wirelessly using Air Link, Virtual Desktop, or ALVR.

They also have a detailed wiki page on GitHub

https://github.com/alvr-org/ALVR/wiki/Settings-guide Goes in-depth about a lot of the features/settings

Quest 2 needs some workarounds (dev mode account), but once you've done those you can just install ALVR (I recommend nightly). As for the games, check ProtonDB. Some VR games (Pavlov beta, for example) have EAC that blocks proton. Some VR games don't work with ALVR due to https://github.com/alvr-org/ALVR/issues/1392, like the Pavlov beta and Crawlspace. Just install the proprietary NVIDIA drivers and use Xorg and most things should work fine. Steam has Proton, which lets you play Windows games with high performance.