I'm asking for Android-based desktop.
Windows is so bad, that I've lost any hope for it to recover.
MacOS is not that bad, but it's tied to Apple hardware and I don't like it. Also it's not getting better either, new releases bring more bloat and features I didn't ask for.
Linux is what I use, but I also lost hope for it to ever become polished experience. Just recent months they introduced another bug to GNOME which probably will not be resolved in years. No big company wants to invest in desktop Linux and without investments it's just not good. I can navigate Linux bugs and workarounds, but I'd prefer not to.
Expecting some new unknown operating system to appear and be ready is foolish, it won't happen.
So Android is the only operating system that could realistically be ready in the foreseeable future. Linux have good support for desktop hardware. Android have good polished stack for applications. Developers know how to write apps for android. Security story for Android is miles ahead that of desktop Linux. So I totally see that Android Desktop could actually be a good thing, with Google sponsoring its development. And if Google will put too much bloat in it, its open source nature would allow for volunteers to build better distributions of it.