California passed the Electronic Communications Privacy Act into law, which states that law enforcement agencies and other investigative entities must have a warrant to obtain content and geodata location information. The ACLU of Northern California, which rallied the movement, hopes this will be used as a model for the rest of the nation in protecting digital privacy rights.
The challenge now is implementation and enforcement.
Wired article: http://www.wired.com/2015/10/california-now-nations-best-digital-privacy-law/
ACLU of NC blog: https://www.aclunc.org/news/landmark-victory-digital-privacy-gov-brown-signs-california-electronic-communications-privacy