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> KDE has a separate class that adds more features, called KConfig.
Ubuntu is not targeting KDE apps, not at the moment at least. What they want to do instead, is to make Qt applications feel native on the Ubuntu desktop.
Qt apps use QSettings, not KConfig, hence modifying the latter would largely be irrelevant to Ubuntu goals.
I'm happy with this move (see http://www.osnews.com/permalink?446284). Qt is a extremely developer friendly toolkit, yet lacking in areas related to user experience. If Ubuntu can iron out some of these (relatively minor) wrinkles it will be a win-win game for all parties involved.