I am an art historian who was married to two Tv directors, so I pick up on it. It have a very important pyschological effect. As you watch, he becomes one in your mind with whatever he is keyed into. Here it is troops, there it was the No chruch. I know Cokie Roberts said she hated it. that's because it works.
How duplicitous of her, when she did the same thing as her life's work.
How small minded, how selfish, that she should denigrate the president for using visual techniques to get his message across to a visually-stimulated, visually-oriented America and world.