One of my favourite plausible science fictional tropes is that of tiny robotic insects. The latest step towards their instantiation has been taken by researchers in Sweden, Spain, Germany, Italy, and Switzerland as they put forward their conception of how swarms of mass-produced robotic fleas could be used for surveillance, cleaning, and medical applications:
The technique involves integrating an entire robot – with communication, locomotion, energy storage, and electronics – in different modules on a single circuit board.
In the past, the single-chip robot concept has presented significant limitations in design and manufacturing. However, instead of using solder to mount electrical components on a printed circuit board as in the conventional method, the researchers use conductive adhesive to attach the components to a double-sided flexible printed circuit board using surface mount technology.
The circuit board is then folded to create a three-dimensional robot.
I can imagine that once this sort of technology matures it will herald a profound change for society. An Orwellian Panopticon where everyone and everything is traced and followed and tracked will become a practicable possibility. Privacy will become one of the most valuable commodities on the planet, with the richest and most powerful people cowering in enclaves sterilized against micro-invaders.
: In that I enjoy them as part of a story and am not entirely ambivalent to their actuality.