Jon Corbet (the guy behind lwn.net) has written an interesting (and disturbing!) preview of Gnome 3.
Suffice it to say that the Gnome UI folks are radically changing the way pretty much everything works, regardless of how current users feel about the changes, in the name of making the UI more "intuitive" for "novice users". Yes...just like KDE did with KDE 4.
I have only two comments: