But, like I said, I see this as a GREAT thing. Now the major players will be forced to interoperate and create desktop standards instead of pushing incompatible solutions.
Sometimes, being right is no fun. Three years ago, I suggested that the Linux desktop was headed for a future dominated by KDE, and that GNOME would be at a disadvantage. Looking back, I conclude that I was right, if only approximately.
What I did not foresee was that GNOME 3 would not only lag behind KDE for code maturity and innovation, but fail catastrophically with users, resulting in alternative interfaces, ranging from Ubuntu's Unity to Linux Mint's re-creations of GNOME 2 in Cinnamon and Mate.
The collapse is so thorough that GNOME is reportedly now talking about obtaining a twenty percent share of the Linux desktop by 2020, where a few years ago its share was well over forty percent.
I know of no figures for traditional desktop usage in 2012, but LinuxQuestion's 2011 survey showed KDE in front, followed by Xfce. Cinnamon was too new to make the survey at all, and Mate registered only a few percent, but, like Unity, both are almost certain to do better this year.