As far as I know ubuntu plans to replace xorg with mir in the future. WM's who need xorg will run on an intermediate layer called xmir instead. In which version will ubuntu remove xorg from the repositories completely? (That's interesting for me since I usually do a minimal ubuntu install and then add some exotic WM's I like).
If ubuntu will drop the support for xorg, is there any ubuntu based distro (like Mint or Lubuntu) which has official plans not to use xmir and to provide an own package of xorg instead?