I recently installed the KDE4 version of Kubuntu on my laptop using the Wubi installer and was able to start using KWin's desktop effects on my laptop for the first time. I wasn't able to do so in the past because I didn't have a native install and VMware Player doesn't support hardware acceleration.
The Wubi installer was a great solution because it allowed me to install Kubuntu without disrupting my existing OS and also allows access to any existing files on the local hard drive.
After installing KDE4.1 beta 1 I started to get curious about battery life. I had heard that Vista's 3D desktop decreased battery life and wondered if KWin did the same.
I installed KDE4 on my desktop today so I could finally try out KWin in all its glory. If you haven't tried it yet I highly recommend it. KDE4 with desktop effects enabled is simply gorgeous. It's fast, responsive, and comes with a nice array of effects options.
Dim Inactive is one of the first effects that I enabled and I really like it so far. One of my pet peeves with Oxygen is that it doesn't change the color of a window's title bar to show which is active, but with Dim Inactive enabled this no longer matters. Instead of changing the title bar the windows in the background are darkened to create a clear contrast that makes it easier to focus on the foreground window.