The caveats are unlike XRDesktop it only works on the Oculus Quest and Oculus Go but more HMDs are planned.
Only Ubuntu is supported but it’s packaged as an appimage so it may work elsewhere.
It doesn’t appear to adhere to software freedom and while the app is free for 2 monitors, there’s a pricing structure to unlock additional features like up to 5 monitors.
Though I haven’t tried XRDesktop yet (because I lack a HMD), Immersed’s software shows every sign of being far more user friendly and easy to set up. In part because XRDesktop is in alpha.
That said, I am VERY excited to see Linux desktop VR broadening and this is a promising sign for things to come. Thank you to Immersed for supporting Linux.
“Simula is a VR window manager for Linux that runs on top of Godot. It takes less than 1 minute to install.”
“Compatibility: Simula is officially compatible with SteamVR headsets equipped with Linux drivers (e.g. HTC Vive, HTC Vive Pro, & Valve Index). We have also added experimental support to OpenXR headsets that have Monado drivers (e.g. North Star, OSVR HDK, and PSVR). Some people have gotten the Oculus Rift S to run Simula via OpenHMD (see here), though we have not officially tested this ourselves.”