So the plan is for the next release of bitcoin to switch from the wxWidgets GUI we have now to the vastly nicer QT GUI that John Smith created.
Don't mean to break the fun, but IMO the best GUI would be browser-based, where the client only exposes HTTP server and serves some customizable HTTP/JS app. And the user's browser does the rest. Such solution would have a number of advantages.
I think Qt is a waste of time - we will still need a huge dev env to change a dot in the GUI.