If you give developers something decent to work with in terms of a UI toolkit and such, why wouldn't anyone use it? Nokia and Maemo have given everyone an ancient and somewhat mussed (in some cases) GTK toolkit to build on. This either means that a developer has to load his own libraries or stick to what the device already has. Maybe that's why the iPhone and the Touch are so damned responsive, all the apps use the same graphics libraries and other such things. Nokia just needs to give better clay to the sculptors so they needn't fetch their own.
I want gloss, non-crappy GUIs *AND* the Nokia (open) way!! I want it ALL! (And I can't see why I can't have it - seriously!)