There are quite a few people using windows today that after receiving a new system reset the look and feel to "classic mode" which is essentially the interface of Windows 2000 which is close to 15 years old. There are lot of people that don't like change for the sake of change.
In my opinion the interface of something like Gnome2/KDE3/WindowsXP along with keyboard and mouse is the culmination of nearly 40 years of evolution of the computer interface towards the most efficient method of input/output, and processing along with information display. What's happening with Gnome3/Unity/Windows8 (and others) is trying to revise the PC interface to be that of a touch based information retrieval device not that much different than a TV (limited input, little control and restrictions how it's used).
It frankly doesn't make sense to me. I don't doubt that over time that as each interface revision fails miserably that they will move back towards a more optimal interface, but I don't ever see phones/tablets and PC's having the same input/use characteristics because they are used differently. Anyone that thinks the PC is going to be replaced by a tablet (or they should have the same interface) doesn't use a PC for real input/output/processing.
I do think there are improvements to be made in the PC interface, but thinking those improvements need to be in the avenue of touch based is IMO crazy. Finally, a small example, the Ribbon in recent version of MS Office has been shown to be easier for new users to learn and master and once learned offers a much more streamlined and quicker use. It's been demonstrated to be better in actual user studies but at the same time it's harder for existing users to use because they are used to the clunkier menu based interface yet you've never seen people complain so heavily about it. I myself did the same after being forced to use the new version at work. Having finally learned the interface I realize it's better (very painful to admit after complaining as much as I did), but the change was brutal on existing users. Without the monopoly MS wouldn't have been able to do it, even though it's better for new users, because of the damage it does to existing users workflow until learning it.