As Kristian Høgsberg says here , the project is not a Red Hat's project. But he still working there.
Phoronix: Wayland Display Server Gets A Terminal
A month ago we talked about Red Hat's Wayland Project, which is a nano display server with integrated compositing manager that is much simpler than the long-standing X Server. Today this project has released a new milestone: Wayland gets a terminal. The Wayland project is led by Kristian Høgsberg and recently he's been attempting to get a full-screen X Server running within Wayland...
http://www.phoronix.com/vr.php?view=NjkxMg
As Kristian Høgsberg says here , the project is not a Red Hat's project. But he still working there.
What I mean by that question is whether Wayland is (or intended to be) compatible with the protocol between X Server and X Client or not.
If it is, then why do we need another GTK backend? Won't the normal X backend work? Won't normal X clients be compatible with Wayland?
If it isn't, then stop calling it an X server. It would be a totally new protocol that's incompatible with X protocol.
Please note that my usage of the word "X" doesn't refer to any particular implementation of X like X.Org or XFree86. I'm talking about the X protocol.
What I understood, is that Wayland doesn't "speek" X protocol. It's a local display server for everybody PC. Once an X server run on top of wayland (as a wayland client), then any X clients could run on wayland (using GTK, QT, ...).
Porting GTK to wayland allowed GTK client to run without the X Server layer.
I admit than if the rootless X server run on top of wayland, may be it's not necessary to port GTK. Maybe it has something to do with client rendering. Don't know.