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It looks interesting, but is how portable is it going to be? It would be nice to have a lighter Xserver, but if it's going to be 75% broken on the BSDs, is that better?
It rely on KMS, so OpenBSD will probably have it before other BSD. For now, Linux will be alone. But those OS will have the choice to continue with XFree86 or Xorg. Wayland use Mesa, Gallium3D and X drivers. Improvments there will improve X too.