If you want to serve displays to multiple systems. Wayland will never do that. Honestly I'm not sure it even properly supports serving different displays to multiple users on the same system well. And I don't think they are planning on it.
It's a really niche paradigm anymore. Remote displays being handled by RDP or something like rust desk. Multiple users handled by hypervisors. Sure it is a bit of a waste of hardware resources. But on the other hand it allows things to be a bit simpler and more secure.
I absolutely have fond memories of setting up a multi seat display server that could access over the internet. Running a full gnome session acessable in Windows. Through the cygwin utilities and windows X client in college 27 years ago.