I agree with the person that said that the gyroscopes are not the entire revolutionary aspect.
If you read Iwata's latest interview, he kept emphasizing the "user interface." He did mention how the controller will be part of the revolutionary aspect (obviously), but he never said that it was the entire aspect itself. The "user interface" is what seperates Nintendo from the pack. It could be anything really.
Reggie mentioned the Rev controller's ability to play every previous generation. That is the only concrete fact that is known about the controller. You might be wondering why they included the cube controller slots. Well, it was a nice addition, and basically demonstrates Nintendo "being on the ball." This way, those that want to play cube games that can't be properly emulated or aren't fun to play through the controller, can play directly with the proper controller (Donkey Konga).
So the controller, I'm guessing, will look like my mock-up in it's basic form. If gyration is included, I know it'll break apart and I also know it will feature every button/stick featured on the cube controller (maybe more). I'm not sure if a cable connects both sides of the controller, or if it's completely wireless. Either way, the main concept is there. If they can somehow pack in force feedback and even a mic and speaker, it would be the best controller ever made.
^^That alone is pretty revolutionary. It boggles my mind to think of what else they have in store. I know the Rev's size is going to become a major factor as well as online, but what else is Nintendo planning?