The progress looks pretty impressive and Giovanni Campagna write code like a machine.
Phoronix: More GTK+ Wayland Improvements Landing
GNOME developers hope that GNOME 3.10 will be in decent shape for initially supporting Wayland as an alternative to X11/X.Org. There's already been improvements made to GNOME Shell, the GTK tool-kit, and other components. Committed today to GTK+ was more Wayland work...
Any progress achieved by extra or closed variant of GTK can show well where is Gnome directed on its development track. I see fog ahead and many questions for general linux developers ecosystem.
Looking good indeed, good job GNOME team.