This stuff scares me and excites me at the same time. Technology is a double edged sword, often wielded by people that don't have humanities best interest in mind. For that matter the average person doesn't have humanities best interest at mind... just numero uno. This particular sword would have to be controlled. Imagine the security threat when someone could concievably send instructions to distant nano-factories for just about anything... Imagine a world where consumption (and waste) is limited only by desire. This kind of threat would require that we give even more power to governments to save us from the wack jobs among us.

Humanity isn't ready for the implications of this. It likely never will be. We will handle this like everything else: reactively; and suffer the consequences.