Probably for most users. I'd be willing to pay almost as much as a basic Mac Mini for one though. I'm probably not representative of the average person though.
You're right. We'll probably not see it any time soon, but I can still dream!
As you may know, Apple does allow unlimited use of MacOS in VMs, as long as the VMs are running on Apple hardware.
So, for example, my MacMini Has VMware Fusion, and I can create VMs running MacOS at will (very useful for testing potentially destructive programs or developing system code).
So if you're willing to spring for one Mac Mini plus $80 for Fusion, you have what you need to run multiple instances of MacOS (in VMs).
I know, that's not quite what you are looking for. Just trying to be helpful... :-)