The big question is whether or not this is a force for good or evil? ... We're getting more cameras whether we like it or not. Is it realistic that everybody could have access to them? Live AND recorded footage? (It amounts to the same thing).
Many technologies have the potential to be evil (I could decide tomorrow that I want to drive my car at high speed into a shopping mall but more than likely won't*). I think this is certainly more a positive thing than not and there will be abuses from time to time but the power here lies in the potential.