Google can spot friends nearby and tell if you're glad to see them
 

Are you happy that Google's new Play Services software for Android developers is out? If not, one of the new features may tell you to turn that frown upside down. Google's latest APIs for Android apps include "Mobile Vision" face detection and "Nea...

http://www.engadget.com/2015/08/14/g...cid%3Drss_semi