A starting point:
The federal government is making progress on developing a surveillance system that would pair computers with video cameras to scan crowds and automatically identify people by their faces, according to newly disclosed documents and interviews with researchers working on the project.
There are very few technical limits connected to surveillance. If a government wanted to, it could monitor every electronic communication you have. It could recognise your face, your car, your clothes and follow you around the physical world. It could recognise every person you meet, track every transaction you make. None of this is rocket science, and within ten years it will be available to every government on the planet. 
Turning away from technical capabilities isn’t going to work. Some government, somewhere, is going to do it and gain a huge advantage over others. They won’t limit themselves to surveilling their own people: any way they can hack into the systems used by others will be used, because knowing what the citizens of other countries are up to is a massive advantage too.
Knowledge is power.
And ten years after that, it will be available to every individual on the planet. ↩