He was looking at predictive tracking in the D4, D800, and D600. For his testing with a moving subject, he was using Dynamic 9 point focus with AF-C. This is his normal approach to a moving subject.
The results will speak for themselves - and tracking is very good. As you would expect, it's better with the D4 and D800, but still very respectable with the D600.
3D tracking is different than predictive tracking. In most situations predictive tracking is enough. 3D tracking uses color information of contrasting colors to help track a subject moving rapidly toward you. With 3D focus, the selected focus point will change as the subject moves around the frame.
I prefer to only use Auto Area Focus when I have no idea of where to focus or I'm giving the camera to someone else. My mother is a better photographer with Auto Area Focus than left to her own devices.
Historically, I have used Single point AF most of the time for control, but I have to say that I am very impressed by Dynamic AF for moving subjects like birds in flight.