What I never understood is how Spice is not elevated to a separate product. It does a fantastic job handling the graphical, audio, and peripheral connections to VMs, so how come there isn't a Spice server that I can just install to whatever Linux system and remote to it with the Spice clients that are already there?

Also, I'd like to plug Sunshine - I think it works on Wayland, and from the tests I did it does a fantastic job on a local network to make a desktop usable, even from an Android device. The downside is that whatever happens on the remote screen, it must happen on the host screen as well, so you can't have the host locked while you do gaming on it for example.