Some related KDE Wayland work worth pointing out that was spotted by Anzwix includes:
KInfoCenter can now run on Wayland. The X11-specific code is now limited to running just on X11/XCB and Wayland detection is provided for by Qt5. A QOpenGLContext will be used in trying to obtain a normal OpenGL context, a core OpenGL context, and then lastly an OpenGL compatibility profile context.
KInfoCenter having a new Wayland module. There's now a KInfoCenter module for Wayland Compositors that is similar to the X Server information module. This module for now just reports all available Wayland interfaces and outputs for the system. Other information may be added in the future.