Interesting clip.

Touch sensors....

Thinking out loud here....measure body temperature, not that it would be the same as a thermometer, but for comparison during a workout, before during and after, capture the data, analyze it, catagorize it, store it for comparison day by day in different ambient conditions over a years time.

Compare the info related to speed of motion in a walk ala an acceleromete sensor in your phone, GPS location recording the topography changes in altitude over the course of a walk/hike, measure heart rate...

NUNCHI?

Point being this sensor stuff is really getting traction.