I would like the ability to un-dock the ribbon and be able to use it outside of the Revit interface; much like the 'Properties' and 'Project Browser.'
AutoCAD utilizes this feature and it creates a lot of extra drafting room on the main screen. I have already taken advantage of the 'minimize to tabs' ribbon feature and filled up a lot of the 'quick-access tool bar' in order to alleviate the need for the ribbon. If it's barely used, it would only make sense to be able to bring it off the screen I am working on.