*Augmented Reality death from above.
*Heads-up displays have never quite flown in the civilian market, but the military are quite used to them.
*Now all you need to be an awesomely effective terrorist is a military-surplus set of these goggles and some cheap homemade robot toy drones. You'd be completely unarmed and nobody could stop you as you blinked in pinpoint accurate pipe-bombs into police headquarters. A teenage girl could do it.
*Wonderful thing, technology.
https://www.wired.com/dangerroom/2011/04/holograms-bring-hell/
