Basically, if we're worried about modern mass surveillance, try to imagine a situation in which nano-scale surveillance is possible of large numbers of people, with devices that attach to nearly anything, are virtually invisible and could potentially even have the capacity to record location, audio and video of anything they're applied to, including both targeted civilians and large areas in which you could never be sure whether or not some government/police controlled army of microscopic bots is watching, tracking and listening. Don't tell me that exactly that wouldn't occur to both corporations and governments as this develops further.