QT and GTK already live together. I can't remember the last time I have had any problems running QT apps in a Gnome environment or vice versa.
A few years ago, the leaders of both projects woke up to the fact that a raising tide lifts all boats and more compatibility in Linux desktop environments would make them more popular and help both projects. They were just wasting effort and shooting themselves in the foot by slinging mud at each other. The Internet tablet likely has room for both QT and GTK libraries so hopefully this predicts future ease in porting KDE apps into the maemo environment without having to install the entire KDM.