KDE does a lot more than launching apps and window management. Mounting storage devices, settings, widgets for managing a whole lot of stuff (power, printers, networks...), managing remote file systems, a huge integrated set of apps (from PDF reader to file manager), managing switching displays....

This is a proposal to be discussed. KDE activities are a useful feature few people use because its different and a pain to set up so something that might benefit from a but of automation. Given KDE's approach it will be configurable and optional. The people behind i seem to be drawing on past work on looking at what users actually liked.