So, on the day of Microsoft's E3 Keynote where it is expected that it will reveal a Wii-like motion controller, Nintendo announces that it releasing its own update.
According to the press release:
"The Wii MotionPlus accessory attaches to the end of the Wii Remote and, combined with the accelerometer and the sensor bar, allows for more comprehensive tracking of a player’s arm position and orientation, providing players with an unmatched level of precision and immersion.
"Every slight movement players make with their wrist or arm is rendered identically in real time on the screen, providing a true 1:1 response in their game play.
"Nintendo will reveal more details about the Wii MotionPlus accessory and other topics Tuesday morning at its E3 media briefing."
So, Nintendo certainly thinks that Microsoft and/or Sony have something up their sleeves and is throwing this very cold water at it.
Source: Nintendo