As far as privacy in the future, I think one thing that will happen will be cultural adaptation. I think that is already occurring. I often discuss "personal" things online with acquaintances and strangers that I rarely discuss in person with acquaintances or strangers. This has nothing to do with being shy and everything to do with opportunity to have a meatier discussion online. If I need to give a lot of background info, I can do that online in ways I cannot do in person. For example, I can give links that give additional info for those that need it.
So I think new technology is already redefining what kinds of info are socially acceptable to divulge and changing how people react to knowledge about things that were previously much more deeply secret. As technology continues to evolve, we will face new questions about situations that never existed before. These days, people routinely wrestle with questions about handling social media, online privacy, etc. Those were questions that did not exist when I was growing up. No one has outlawed FaceBook even though, for example, people have been fired for things they said there.