By the standards of previous releases in the KDE 4 series, KDE 4.5 is tame. It has few new applications, and introduces no new technologies. Yet with its combination of small innovations and interface improvements, KDE 4.5 still manages to be a release worth installing. Although it does not try to expand the concept of the desktop, it does make KDE easier to use in dozens of small and satisfying ways.

Read the full thing at http://itmanagement.earthweb.com/osrc/article.php/3899151/KDE-45-Trades-Revolution-for-Evolution.htm