Huh? Never heard of QML?
I can spot QML from the ill-fitting looks and mostly poorly though-of interaction.
People think QML has magic powers, but in reality any UI designed in 5 minutes has only the value of a 5 minute interface.
To me QML is the biggest mistake in Qt5.
I think they are trying to appeal to the JavaScript hipsters as a way to stay relevant, and in the process also annoyed many C++ developers that don't see a value in it.
All the other major declarative toolkits, XAML, AXML, JavaFX, Cocoa don't use a JavaScript like language for the UI descriptions.
Not really inspiring.
Also not everyone jumps of joy to use JavaScript to describe GUIs.
Honestly I jump with joy every time I start a new react project.