True but again the 1D is not big it is not like u are lugging a 4 by 5 around with a 40LB tri pod. If you want a portable rig you are not shooting sports. Do you need fast AF to shoot the Golden gate or Grand Canyon? I don't think so. I would rather they released the claimed "3D" made it the smaller format body and left the 1D alone as far as build and eventually allowed for sensor replacement modular design a la RED. Then you could spend 700-1200 every 3 years instead of $7500!

The 1D isn't just for shooting sports. Only Canon marketers think that "designing" the camera for a single purpose is a good idea, because it forces people to buy additional cameras in order to achieve the balance they would otherwise get from a more general-purpose design.
The additional bulk of the 1D series is useful for counterbalancing a larger lens, but there is absolutely nothing in engineering terms that requires the 1D camera bodies to be as large as they are when the additional bulk can be achieved with a separate grip.
As for fast AF, it's desirable for many situations, not all of which require having a huge lens attached to the body. For instance, indoor basketball can be (and often is) shot with fast primes like the 85 f/1.8 or 100 f/2. But you still want the fast and reliable autofocus for it. It's also desirable for taking pictures of kids.
And it's not just that the 1D series autofocus is fast, it's also flexible. You can put your focus point anywhere within a relatively large area of the frame, and that means you can frame your shot and focus on what you want to focus on simultaneously.
The 1D series is the top of the line for Canon. It should be as general purpose as possible.



