Several of the things you list are the duty of the platform plugin and the style engine plugin and don't actually require any changes to the core widgets. Yay l

Several of the things you list are the duty of the platform plugin and the style engine plugin and don't actually require any changes to the core widgets. Yay layering. Personally I think entirely new widget classes should be accepted into the QWidgets module, but you may be right that there's some resistance to that - but the bar for new widgets has always been fairly high actually, it was a rare occurence even before QML (neither Qt 3 or Qt 4 saw much in the way of new widgets during their respective lifetime). I think the case that a lot of the "new UI challenges" are better met by QML is also somewhat legitimate, in which case there's an incentive for porting to it.