http://www.csoonline.com/article/215085 ... ivacy.html
After describing how smart metering system might be able to tell you what someone is doing inside their house, the White House report points out that once someone leaves their connected home, "facial recognition technologies can identify you in pictures online and as soon as you step outside. Always-on wearable technologies with voice and video interfaces and the arrival of whole classes of networked devices will only expand information collection still further.
"This sea of ubiquitous sensors, each of which has legitimate uses, make the notion of limiting information collection challenging, if not impossible," said the government report.