From /.

"OSNews posted a very long and interesting comparison between the most popular desktop environments today: Windows XP Luna, Mac OS X Aqua, BeOS/Zeta and Unix's KDE and Gnome. Some of the points in the article can be thought to be 'subjective', but overall many good points are made and it seems that there is room for improvement for all DEs."

From OSNews.com

So many operating systems and so many graphical desktop environments... This article is a comparison of the UI and usability of several Desktop Environments (DEs), that have been widely used, admired and reviled: Windows XP Luna, BeOS 6 (Dano/Zeta), Mac OS X Aqua and Unix's KDE and Gnome. Read on which one got our best score on our long term test and usage.

Check out the link for the full story. Initially found on /.