How is the software support and marketing going to work?
If M+ is owned by a minority of the userbase and its supported - optionally - by, say, a Table Tennis game, this game can't rely on the improved precision too much for the gameplay or it would screw the non-M+ users...
But they can't give too much of an advantage to the M+ or the Wiimote that the Wii image is built around will look like a badly functioning device. From a marketing point of view selling "the thing that fixes what we sold you before" doesn't sound too cool, because it's not different enough from the previous device, like say the balance board is.
Maybe they'll push on "M+ required" features and games to differentiate it, instead of intermingling it with normal Wiimote controls.







