The public display no longer scrolls. Prior to the current design, I had numerous request to be able to show more than one finisher at a time. The old version only showed one finisher at a time and many people found it more useful to show a user-defined list of most recent finishers. I think some also mentioned they didn't like it scrolling through old finishers because that seemed like a waste and encouraged people to crowd around the finish line. So they would rather use the Results Kiosk screen (which allows you to hide the bib # entry section on the right) or the scrolling results view on RunSignUp to show scrolling results.
As for the team scores, yes, those should update in real time as people finish. :)