They use Qt for mobile apps, but I don't think they use the whole KDE environment. For instance, I really really doubt that the KDE daemons are running, and the

They use Qt for mobile apps, but I don't think they use the whole KDE environment. For instance, I really really doubt that the KDE daemons are running, and they aren't using the K* apps either. As for porting, I think they have a consistent story - use Qt everywhere. It's clear that they're moving to Qt, and while I expect they will continue to run other peoples' GTK apps on the desktop, I doubt they'll be writing many more of their own.