This is a great video to finish the week with! Imagine having this technology in the classroom! The way I see it, the best use of this would be to have everyone being able to share their screen with everyone else. So the teacher could be able to take over their screens when necessary, but then you could have a student share with their classmates.
The big advantage to doing it this way it you can only do one thing at a time on an iPad so it would cut down on the distractions when everyone is supposed to be paying attention.