My idea is for a parameter in title blocks that could read the version number of a project file and then that could be used in a label in the title block. My starting view for our projects is a sheet that has lots of info. Doesn't show up well in the thumbnails of the home page though. But if I had a parameter that could read the version number of the project as last saved, I could put that into a largish label and put that there so that it could be seen. That way when a project is updated, it would update that graphic as well.
A smaller version of the label could be used on the normal title blocks so that when a sheet was printed to pdf, printed to paper, or even exported to a .dwg file, we could tell what version of Revit it came from.