Screaming Penguin - Source Does Matter

Review of KDE 4 at Ars

KDE 4 sure do look pretty.

The review talks about many of the new features, all built with QT4: a new file system browser, a new desktop shell, a new multimedia system, new scripting framework, and much more - and all with clever names.

And, it also notes that there are Windows and OS X ports underway now too - huh huh cool (though the usefulness of that is debatable, still neat).