Visual Knowledge organizer
In my opinion Citavi needs one, similar to SuperNotecard.com. An option to display knowledge items as configurable index cards (custom colors, and configurable displayed fields - similar to Anki's templates), with drag & drop functionality to order and stack them, display cards in one stack (category) at a time and so on.
It would be great to also have a possibility to print out those index cards (with full bibliographical information) on the printer, because many of us would like to work with good, old paper index cards to organize, group and order our knowledge items. Color is so important in this kind of work!
I would print my cards (knowledge items) on colored index cards and take them with me everywhere (or maybe there can be a complete list of sources with quotes included? I could then print similar index cards using word or excel? Please, add at least this possibility if you do not decide to create visual knowledge organizer soon).