Upgrade to two 40″ Screens

Why have two screens? In a single screen solution when a presentation is shared you view the presentation as the main image and the people at the far site as a picture in picture.
When you upgrade to a twin screen solution you get the ability to view the people at the far site on one screen and the presentation on the second screen. In a 3 way conference you view each site on a separate screen and you see yourself/site as a picture in picture on one of the screens.