Maybe this is a good idea, I don't know about X/Wayland enough to say. But it worries me that Ubuntu is increasingly striking out on its own. What I like about the GNU/Linux ecosystem is that a lot of distros share a lot of common underpinnings, and everyone benefits from a large community fixing bugs and improving those underpinnings. It's also less knowledge to have to keep in your head for system administration stuff. (Which is still necessary in Ubuntu, regardless of what the "it just works for me" people say.)

Maybe this is the kick in the pants Linux needs to increase adoption. But I would much rather know GNU/Linux, not Ubuntu. Now Ubuntu is standing alone with Compiz, Unity, Upstart, Launchpad, and Mir, all pretty fundamental pieces of the core system. In a decade, will switching from Ubuntu to Debian be as big of a culture shock as switching from Windows to Linux?