As far as privacy itself is concerned, I have a simple answer to that. (It makes up chapter 4 of The Transparent Society.) Human beings want it. We naturally are built to want some privacy. Moreover, if we remain a free and knowing people, then sovereign citizens will demand a little privacy, though we’ll find that we must redefine the term for changing times.
The question really boils down to: Will tomorrow’s citizens be free and knowing? Will new technologies empower us to exert reciprocal accountability, even upon the mighty? It may seem ironic, but for privacy and freedom to survive, we’ll need a civilization that is mostly open and transparent, so that each of us may catch the would-be voyeurs and Big Brothers. So that most of us know most of what’s going on, most of the time.