A low-profile robot glides silently over a magnetic strip on a cement floor, operating unnoticed in an assembly plant. When someone walks in front of it, the robot stops and waits. If you press a button on one end of the plant, you can summon the bot, then connect a few metal carts to make a robot-powered train and instruct the bot to deliver the parts.
This process happens over 180 times per day, seven days a week. Before the bot took over, a human operator pulled the metal carts by hand, over and over again. This is not a wonder of engineering per se, but it is amazingly practical and helpful.I noticed the bots right away, but then again, I’m a major Star Wars fan.