It seems most people on here shoot Nikon but thought I'd post this anyway.
http://blog.apertureacademy.com/2012...prototype.html
You can see in the first pic that the 200-400 has a built in 1.4x teleconverter making a quick 280-560 with one stop less aperture.
The LCD screen is also interesting in that it appears to be even wider than 16:9
William.