The new Wii MotionPlus™ accessory will hit U.S. retailers on June 8, taking the motion-sensing controls of the popular Wii™ system to new levels of precision and performance. What’s more, these control enhancements will be on vibrant display when the Wii Sports Resort™ game launches on July 26
If you think the current Wiimote apes your movements like a palsied monkey, MotionPlus™ is good news. It plugs into the Wiimote to, if you believe the hype, greatly increase it’s precision. I haven’t seen it stated anywhere but I’m assuming the benefits will only be used by games explicitly written for it.