Wayland in dom0 with KDE or qubes-wayland

As far as I am aware, there are two ways to use wayland in qubes. The first is to install KDE, which lets you choose between a wayland session and an xorg session at the login screen. Second would be this: GitHub - DemiMarie/qubes-wayland
Just to clarify, that would switch dom0 over from xorg to wayland, yes?
And as for the vms themselves, if I were to install it inside of a hvm, then that would switch it from xorg to wayland also?
Are there any side effects such as the copy-paste breaking? (for the second option) How about the GUI vm? Is it possible to use sys-gui with wayland if dom0 is running on wayland?

Wayland is not yet supported in Qubes OS: