Martin Gräßlin took a break from his KWin Wayland enablement work
to instead temporarily focus on getting the KDE window manager up and running with Qt5 and KDE Frameworks 5.
There's still work ahead and the support isn't yet in a working state for end-users, but the German Linux developer has made progress in having KWin run on Qt5 and KDE Frameworks 5. KWin is to a point it can compile, link, and install against KDE Frameworks 5 but there's still work left -- like porting of code to X.Org's XCB while other steps are rather trivial.
Martin has made a KWin on Frameworks Wiki page
to detail the current status and progress, which he shared via a new blog post
By this time next year, KDE should be running on Wayland
with Qt5/KDE Frameworks 5.