translation: this is another cluless FOSS project like gimp or samba that we have no way of ballparking in the accuracy of a decade.
Translation: It is a complex project and it is more important to get it right than work on a arbitrary time based deadline. It is also something that incrementally improves rather than go from "not ready" to "ready" in a particular day.
Having said that, I expect Fedora to look into it for default around Fedora 20. It might take 2 or 3 years to get everyone on board and running smoothly.
Well, with wayland as X client I haven't seen a mouse pointer for a while, in the wayland-terminal the letters e,z,s,j,y, etc. cannot be typed. At this point I couldn't test further keys because something got changed so everything got remapped, for example a mapped to enter or something. Last time I tried weston-launch from X it opened wayland in a tty, and when it crashed I couldn't type those letters in X anymore either. Also, doing "pkill weston" in a tty-weston locks up everything on radeon.