Comes from a Q&A sesion with Miyamoto at Nintendo Japan page.
About MotionPlus. We're implementing it so that players can feel like they themselves are holding the sword. In the previous Zelda (TP Wii) the targeting was based on the IR pointer. This time however, we'll be using MotionPlus for a variety of more convenient targeting systems that will allow for more pleasant gameplay.
Complete info:
http://www.nintendo.co.jp/ir/library/events/091030qa/index.html















