I recently watched a Windows 8 demo and thought to myself: "Holy crap, I wouldn't be able to tell that apart from Unity!"
We, as a community, have long liked to repeat things like "Follow the dream, not the competition". However, when someone actually does it they seem to get crapped on!
From what I saw of that Windows 8 demo, it looks to me like Linux is getting out in the lead of Windows.
Instead of being praised for innovating or trying something different, I've seen people spitting venom at Unity and GNOME 3. I'm sure they would appreciate constructive criticism, for example I just can't live without focus-follows-mouse (not available in Unity). However, I've seen little constructive in the response to these desktop environments.
But the response to trying something new seems to be: The nail that sticks out gets hammered. People are practically falling over themselves trying to be the first to criticize Unity and GNOME 3.
The thing is: nobody is forcing anyone to use Unity or GNOME 3. Install kubuntu-desktop or xubuntu-desktop or awesome or whatever you like better than Unity and carry on with your lives.