Your guess is as good as ours.
Nintendo's business plan for the next decade will revolve around developing a "Quality of Life" based platform.
No details are available yet, but Nintendo President Satoru Iwata indicated that more details would be revealed in 2014, and the platform would be launched in April 2015. The new business area would impact Nintendo's profitability in the fiscal year ending 2016.
One facet of this platform will involve "non-wearable" devices that would monitor health, in contrast to the wearable devices (such as Fitbit, or even Nintendo's own Wii Fit U Meter) that have become popular.
Iwata also indicated that while this business will be separated from its games business, the two will have certain synergies. Certainly, Wii Fit could provide an example of this possible strategy. Another example is the Wii Vitality Sensor, which made its debut at E3 2009, and was never heard from again.