Francis Giannaros published a screencast featuring KWin’s compositioning features.
The very well made video is provided as a Flash video (Google) as well as an high quality Ogg Theora video. It shows KDE 4 from a point of view which got just to few attention the last weeks because it requires a full install or at least a well equipped machine and the Live CD. Thanks for the great video!
Francis also mentioned that the effects are all smooth on the used hardware (AMD64 3400+, 1G RAM, NVIDIA 6200) and that the effects are only slowed down in the video due to the recording process – if at all (just in case you know, video recording of compositing requires taking full shots all the time!).
Writing about hardware requirements reminds me that I am still missing a list of supported drivers/cards) for the new KWin, or the information of how KWin determines if it can run in composition mode or not. I think in the beginning there was a script which checked the driver type and decided afterwards if composition should be activated or not. But I have no idea how KWin figures that out today given that most drivers around support AIGLX (or similar approaches) these days.