You guys have it all wrong. First off, let me just say that when I saw it, I almost died of laughter at how ridiculous it seemed. Now, however, I have a different opinion.
Lets start with the left hand. You'll use the accessory with this hand, most notably the analog stick. This will allow you what is near a Mouse-Keyboard setup, only instead of having WASD, you'll have full analog control. The analog stick
ALSO HAS 2 TRIGGER BUTTONS ON IT. So no, you won't be using only your thumbs.
Moving on the the right hand. You'll use the completely sensitive "DVD remote." This also has a trigger button on the bottom. The A button will be used for primary actions, like jumping or opening doors.
And best of all:
QUOTE(IGN)
This add-on makes it possible to play Revolution games in a more traditional manner. The shell is designed to look and function like accepted "regular" controllers, such as the Wave Bird. After its bottom casing is removed, the Revolution's free-hand-style remote is inserted into a gap in the middle of the controller shell. Gamers can then use the shell as they would a traditional controller, with a notable difference: the pointer remote's sensory functionality remains active. As a result, gamers get the best of both worlds: more buttons and two analog sticks along with motion-sensing operations. In a Revolution version of Madden Football, gamers might be able to use the combo to control players with the shell's analog sticks and execute pinpoint passes with the pointer's improved accuracy.

Nintendo has not yet released official imagery of what the controller shell might look like. However, we've created a mock-up (above) based on what we know of its functionality. The real controller shell is likely to connect to the free-hand-style pointer in a very similar fashion. Please note that we realize our model is not entirely to scale, but this is the best we could do on short notice.
I suggest you don't bash it before you've experienced it. Check out these articles for more info:
Understanding the Revolution ControllerRevolution Controller: The PossibilitiesHands-On with the Revolution ControllerDeveloper Commentary