Another nice thing about Kwin-- something Canonical may use once Wayland and KDE 5 hits. Because of how they are restructuring the frameworks and the classes in KDE 5 the idea is that you could use Kwin as your window manager even if you dont have KDE-meta installed. It will use KDElibs if they are available, but otherwise will drop back to pure QT. I know Unity 2D was QT based, and since Kwin supports plugins like Compiz did, Canonical may be wise to go a QT route for Unity 3D and use Kwin as the window manager.
Originally Posted by bachinchi