One of these days I'll have to get "into" QT. It looks like a great successor to some of the concepts originating with Neuron Data's tools, which I spent a lot of years learning and working with. For now I've been focused on Java server code, but I've never really been a fan of Java for writing client applications, and I've no interest in buying an Android device just so I can stick with Java while working on front-end code.
No, to me, client side means an actual computer, not a mobile device. And QT hits almost as many platforms as Java does, so it would seem to be an excellent fit for my goals. :)