KDE already has a mobile platform: http://plasma-active.org/ http://plasma-active.org/ It is still in development, but the entirety of the plasma development f

KDE already has a mobile platform: http://plasma-active.org/ http://plasma-active.org/ It is still in development, but the entirety of the plasma development framework is around fixed size apps that on the desktop occupy popups from a widget bar and on mobile run as full applications. Additionally, qt makes it very easy to develop for mobile since it uses a plugin based native toolkit system that skins your app according to the ui conventions of the target. A qtquick 2.1 app on Android looks Holo, on Windows looks Aero, on OSX looks Cocoa, etc. That is probably the reason Canonical picked qt for its sdk. It is very easy in modern qt paradigms to have a qml app that self-manages its scale based on screen size - physical dimensions, that is - so you can have your interface shift to "mobile mode" when the display it is rendered on is smaller than, say, 11" in size, and runs in a window with mouse / keyboard UX above that.