Gstreamer ... what's next ?

Currently audio and video players on the Linux Desktop are starting to embrace Gstreamer to deal with audio and video ... that's really a good thing that helps avoiding duplicated efforts, and that also helps focusing on enhancing things instead of reinventing the wheel ...
The next step, would be a unification of meta-data storage. This would greatly ease multimedia players development, as well as user experience, since meta-data could be shared between all players, and user won't have to re-import all his media file again ...