Then shall there be two distros of IBM and Microsoft, grinning at each other across a dead land filled with rottenness.
People have said this for a decade and it still hasn't happened... IMO it won't either. It's privately owned and even if they do go public it's doubtful they'll give away so many shares that they can be taken over... It's Mark Shuttleworth's baby and he doesn't seem to want to sell it.
embrace
extend <-- you are here
extinguish
That being said, I didn't mind Unity or Mir.
By virtue of power-of-authority, they're quite literally forcing this garbage on the greater linux ecosystem that other people simply don't even know exists. Ask anybody on the street if they know what a Linux is and if the answer isn't 'no', the ones who can respond will say something like 'oh yeah, i have ubuntu on my thumb drive'.
If you'd have told me this would happen in 1995, I'd have said you're nuts and gone back to hammering dents out of my Yggdrasil install as I chuckled.