We have some extra details to share about the launch of the new Wii Fit U for next year. Supposedly, when it hits retails store shelves in 2013, the new lifestyle experience for the device will include a pedometer dubbed the Fit Meter. Here's a quote with some of the details,

Functioning much like the Fitbit, this additional peripheral will, presumably, be clipped to users' clothing, gathering movement data that will eventually be transferred to the Wii U console for use in over 77 game-based activities.
We will keep you guys informed as more details emerge.

Source: Engadget