The GNOME 3 "Displays" app is pretty good. You can toggle mirrored, external screen to the left or right by just dragging, etc. It isn't quite as slick as the one shown in the video, but it's certainly functional and easy to use.
KDE has the same thing, but it's not smart at all. It will pick the wrong resolution for the wrong screen, if I disconnect a screen the windows that were on it become inaccessible, it never remembers my setup when I re-dock the laptop, and so on.
