One of the next sensors to become mainsteam on the phone will be a photoplethysmographic sensor.
I was a (relatively) early adopter to FourSquare. Today FourSquare
While this article by Randall Stross doesn’t mention exact correlations,
Dr. Shawn DuBravac is author of the New York Times Best Seller Digital Destiny: How the New Age of Data Will Transform the Way We Work, Live, and Communicate, which explores how the world’s mass adoption of digital technologies portends the beginning of a new era for humanity in the realms of business, healthcare, finance, transportation and culture.
