It's been a very interesting couple of weeks to say the least with information on the Wii's successor. The touch screen controller, the streaming game content, to the overall power of the system have been the talk of the web.
When talking about how we will be controlling first person games with this new controller, many have speculated that either the dual stick method would work or using the touch screen like a virtual mouse would do the trick similar to the DS in the past. Whats funny though, is that no one has mentioned or considered the fact that this controller will also have full motion control similar to the 3DS. If you move the 3DS in any which way, it knows where you are turning it. The 3DS has similar (if not better motion sensing) than the Wii Motion Plus. It has been mentioned also that this is one way to control first person games on the 3DS without needing an extra analog nub.
Don't forget that the 3DS has motion control too
Put this together and you can see where I'm going with this. The Project Cafe controller should be able to let you control the view of the action and how you look from moving the controller itself. One of the analog sticks can be used for walking and strafing, while small movements with the actual controller in both of your hands on the left and right side of it will control looking. The Cafe controller won't be able to reproduce an IR sensor (At least I don't think so) so there wouldn't be any bounding boxes to worry about, just your screen movement being directly controlled with how little or how much movement you want to use. The controller will probably be so sensitive to movement that you'll be able to adjust the sensitivity to how much motion you want to employ. Your aim would be very steady since you'll be using both your hands as opposed to using just one like with the Wii Remote. I found that while the Wii Remote/Nunchuk combo was very nice, it did feel uncomfortable for a lot of people giving a sense of not really having full control all the time or feeling a little out of control as well. Having full aiming control in both hands makes for a more solid experience in my opinion.
Imagine you moving the controller itself with both hands for aiming
I can't wait to see this type of method used and hopefully it can become a standard for the future of FPS games. The amount of freedom that it will allow developers will also be amazing.