Well, it's not for me. I'll struggle along with the D810 and really not think that I missed a significant upgrade. When I saw the adapter for the F lenses I thought of the Hasselblad X1D adapter for the H lenses - both ungainly and defeating the purpose of the body. IMO, if you want a Z7, you need the native lenses to take advantage of the concept. Which, is in essence, a changeover to an entirely new system. Perhaps I'm a dinosaur with the F system, but so be it.
The X1D was more interesting to me, but two things put me off - still don't like/trust EVF's and second, I contacted a Hasselblad dealer about trading in my CFV-50c on an X1D and all I got was an "I'll get back to you..." Which never happened.
My next new camera body has not broken ground. Yet. And hell, at my age I'll probably be able to shoot and enjoy the D810 and Df until I croak.