As stated already many linuxdist will move from X11 to MiR and/or Wayland with possible start from Q3 2014 (atleast KDE dists). Some has alphas already.

So most of those toolkits is or will be ported. Actually it is a must in the future. X11 is doomed but it will ofcourse not die 2014 but there will happen alot in this area next year is my guess.

So I do not think you have to be affraid that X/Y/Z will not be there. AFAIK terminal emulators already exists for Wayland. Also one prof of concept 3D based Qt5 terminal