[OFFTOPIC] For certain reasons, I recently needed to use iMovie+Garageband (hackintosh tiem.) . The dock is hopelessly useless for window management. Rather, it's a big-*** launcher. Expose is a lot more useful, and Mission Control makes it a LOT better. [/OFFTOPIC]

Ontopic, "what's lack in Maemo" : portability to other devices (for numerous reasons we all know).