Nintendo should do a Wii Sports Club bundle with a Wiimote minus the tablet controller. $199.99. That might shake things up. But no, it won't have the same impact as 5-6 years ago, a huge part of the appeal was that "off the couch/motion gaming" was something completely new and fresh back then.
The "wow" factor wears off after a few years and then it just becomes a normal gaming feature.
I think what they've done with Wii Sports/Fit/Party on the Wii U is smart though ... they know they can't get away with charging high prices for those games anymore, so $20 for Wii Fit U and a freemium model for Wii Sports Club are very smart. $49.99 for Wii Party U with a Wiimote is OK too.








