There, I said it. Inevitable really.
Gnome 3 and Unity both completely disregarded what users actually wanted and set about dictating what users should have. Swayed by trendy hip touch screen mobile devices, they've done their upmost to drag the desktop in that direction.
In the interim, Microsoft & Apple continue to innovate by seperating the Desktop & Mobile OS, because they are aware these are two separate paradigms.
Software development rule one - don't piss off your user base.
It's the concept of familiarity - whether the current accepted desktop interaction is the best or not, it's what people are familiar with. The Dvorak keyboard layout is arguably a better solution, but everyone knows qwerty. Qwerty wins.
By dramatically changing the way the desktop works, Gnome & Canonical (unity) have effectively forced a 'Dvorak of the desktop' upon unwilling users, assuming their desktop reshuffle is actually any better of course, which arguably, it's not.
Those users voted with their feet (or fingers) and switched desktops.
Yet Gnome & Canonical continue forward, convinced they've got it right and the rest of us are wrong. So answer this then, if your direction is the right one, why are Microsoft and Apple not following a similar route? Simple. They know it leads to a dead end. But hey, Gnome, Canonical, this is you:
"La la la la la - I'm not listening, I have my head up my arse...."