Have a look at the Lubuntu mailing list. Recently there was a discussion about display servers. One of the Lubuntu devs wrote (and I'm paraphrasing from memory here) that LXDE in a post-X11 world is a question that must be faced at some point. Given that GTK2 will never run natively under Wayland but Qt 5 already does, IMO is the outcome is clear.
No announcement yet.
Qt 5.1 Finally Released With Lots Of Good Features