Its unknown right now whether the game will use infrared for
anything, but so far, everything we have seen of the game uses MotionPlus. If even the
pointer for the bow and slingshot use MotionPlus, I find it hard to think of anything that would still use infrared.
Will anything in the game use infrared? I don't think we will discover the answer to that question until the game is released, as such a matter is really trivial and new pieces of information before the release would likely not reference this. I think we will have to wait until the final release of the game to find out. It doesn't hurt to speculate though.
Isn't that what the game is mainly focused on?
Or am I mistaken here?
The MotionPlus is the accelerometer and gyroscope, which alloys for the 1:1 motion control. The IR is just the sensor bar emitting infrared light, which is then translated by the Wii remote into the screen position and sent back to the console through bluetooth. The infrared light serves little purpose except for the pointer.