Last time I checked the main cable was going into an USB male plug. Have I missed something?
Oh - btw - I love it that my Micro USB car adapter (different mobiles, different dedicated GPS navigational systems) has been working with any device I throw at it. But basically Apple's customers seem to be afraid of choice.
You've definitely missed something.
The dock connector features pins for more than just USB. Good luck getting analog video out of a USB port.