i see... them it should be everybody happy, and no need to run clumsy hacks of server on top of server.
Basic it may be but will be more than enough as you say, since GKT/Qt etc already runs natively on wayland then.
Who ever wants the new fashion, instals wayland, whoever wants to stay using NX installs X... no promiscuity/bickering please, no need at all, just chance the WM. And then the DM login could have 4 desktop options... or more options... Gonme wayland, Gnome X, KDE wayland KDE x... and all the applications will be transparent to this