Back on topic, I have thought that there would be no new features except bug/security fixes for the KDE 4.x series?
There will be no new features for kdelibs since 4.9 or so and kde-workspace (i.e. kwin and plasma) since 4.11. There will still be updates for applications and other libraries, possibly into 4.13 or beyond. The idea was to make a smoother transition compared to 4.0, with the old libraries supported with bugfixes for a longer time to make porting applications more seemless to users.