Sebastian Kügler of KDE has talked about progress made on Plasma 2, the port of the Plasma Workspaces desktop to using KDE Frameworks 5 that in turn works atop Qt 5. The possibilities opened up for Plasma 2 due to KDE Frameworks 5 and using an OpenGL scene-graph are impressive and awesome.
KDE Frameworks 5 is coming and with it will come Plasma 2. The Plasma 2 interface is designed around an OpenGL scene-graph with all composition occuring on the GPU. Work recently done by Sebastian and others have been working on QML imports and other components for bringing the new Plasma desktop up to speed on this highly-modularized next-generation KDE stack.
Here's the demo code in action to show the new possibilities opened up by KDE Plasma 2 with Frameworks 5: