Sounds like a nice project, I did not want to insinuate that the quality is not good, I did not used Qt in a few years(since Qt4 days) so I am not sure about QML, without doing any research I think I am inclined to use the classic QtWidgedts for a desktop applications, SQML seems to me more mobile or designer first toolkit.

I strongly believe that Microsoft made a huge mistake not making .Net WPF and Silverlight cross platform and open source it. they would have made money by selling the Visual Studio IDE,