Wayland is new display server protocol which should follow up the old X11 protocol on some day. Wayland should offer more flexibility and better performance. The good news is that XBMC support for the next-generation of Display Server is on it’s way!
Sam Spilsbury, former Ubuntu employee made a initial port and submitted pull request for Wayland support. Details about the port and Wayland on XBMC are posted on his blog!