It should be remembered that Qt for S60 is still only a technology preview, so don’t expect solid S60 like applications in the demos. However, as the previews continue to be updated expect greater conformance with the S60 UI. The ultimate goal is for Qt for S60 to be a viable alternative to Symbian C++ for applications development.
There is no indication if the signed files to allow developers to use the Mobile Extensions for Qt for S60 will follow.