In the sci fi movie Minority Report, bug-like robots swarm into buildings to find a fugitive. This sequence may have anticipated a real nightmare. Monstrous robots and machines of the future may be more visually dramatic, but if you think about it they do not even come close to the dystopia of the swarm.
"BAE Systems will lead a team of scientists that will develop miniature robots to improve military situational awareness. The company signed a $38 million agreement with the U.S. Army Research Laboratory to lead an alliance of researchers and scientists from the Army, academia and industry."
"'The idea is that a variety of crawling or flying mini-droids will be produced, able to go into situations where human troops might fear to tread - caves, bunkers, mountains, hostile urban areas etc. The robo-bug army would then spy out targets and intel for human commanders to act upon.'"