Hi First of all: Thank you very much for the answer!
Porting to Qt 5 is being done in a separate branch, KDE Frameworks 5 (KF5). Yes. I saw that much on projects.kde.org and multiple blog posts.
You might see a straight port, then refactor as the most conservative strategy, and this is what will happen for most KDE applications, but this isn't possible or wise for the desktop itself. This is because Qt 5 on X11 uses the the async XCB API instead of synchronous Xlib, and Plasma and KWin have a lot of Xlib in their code that requires significant refactoring to remove. Ok. Thanks a lot for this explanation! How long do you think, it will take until the refactoring is done and openSUSE will receive this refactored/cleaned up KDE environment? I'm really looking forward to a KDE environment which is capable of using the full graphics acceleration of the Tegra GPU.
best regards David