I have heard, from an old Digital Equipment Corporation acquaintance, that someone, somewhere is resurrecting VMS (the OS that used to run on Vax computers).
As you may know, the architecture for Windows NT was derived from VMS, which in turn was derived from earlier DEC operating systems. Digital had its technical head screwed on straight. It's a shame they fell by the wayside.
Re-developing VMS could actually lead to good things. But again, they'll have to create a subsystem for running Windows applications pretty seamlessly. The chance of that working well is greater than, say WINE, due to the underlying architectural similarities.
By the way, to this day I use a Digital LK250 keyboard. The one I'm typing on right now is literally 30 years old, and as wonderful to use as it was the day it was built. No "Win" key and I rather like that.
I only mention this to prove that some things done in the past were actually good, and haven't been improved on yet.