Wii Health Pack could be a major killer app if executed well (and this is Nintendo we're talking about...) There's a mini workout craze just around Wii Sports, and Americans jump on all sorts of crazy workouts and diets.
"[Our former customers] are unable to find software which they WANT to play."
"The way to solve this problem lies in how to communicate what kind of games [they CAN play]."
Satoru Iwata, Nintendo President. Only slightly paraphrased.