As the days past, the Gnome developers get closer to fully supporting Wayland on their Gnome desktop environment.
A while ago, the developers built Gnome Shell in two separate binaries, one for X11 (libgnome-shell) and one for Wayland (libgnome-shell-wayland). Mutter, the default window manager of Gnome Shell will also use libmutter for X11 and libmutter-wayland.
Now they have introduced a desktop file for the GNOME Shell, to add Wayland support under the gnome-session. It autostarts GNOME Shell and Mutter running on Wayland.
Full Wayland support should be added to Fedora 20, allowing the users to choose to run Wayland from the GDM screen.