KDE's Plasma shell uses Qt QML to make flexible layout apps that work with touch and keyboard+mouse, just like Ubuntu Phone/Unity 8. Plasma Mobile is KDE's attempt to leverage that into an open source phone OS. Canonical didn't seem interested in working with KDE despite the common tech base. I wonder if Canonical will continue development of any of its Ubuntu Phone/Unity 8 apps, the whole point of convergence was they would work on desktop as well.