http://www.zdnet.com/mark-shuttleworth- ... 000017897/
I am absolutely open to new ideas. I personally think Mir is excellent and should not allow blank screens or other GPU related problems that linux encounters.
For 14.04 LTS, the X protocol is in the grave. Whereas 13.10 implements XMir - a sort of passthrough still dependent on the archaic protocols.
Although Unity will be absolutely bugless, i'll just pass if off. I wont use anymore...for the time being.
KDE 4.10.x is a formidable DE. Even Gnome 3.x is preferable. Future Gnome versions will be a re-awakening for the desktops and i do prefer gnome-shell over unity.
Compiz is now fully fragmented. Unity will implement it more discretely. So even if compiz formally gets no support, its integrated in Unity and gets improved upon(natively). I honestly dont care for compiz as much and KDE uses kwin. Xcompmgr, too does a brilliant job.
Gnome-classic is just a fallback, nothing more. Mate is deja-vu and trying to live up to a false dream....but these are just my opinions.