Take a look at this video of the media facade on the former Bayer headquarters in Leverkusen, Germany. Built by ag4 media facade GmbH and GKD AG, this remarkable display has 5.6 million LEDs covering the entire 17,500 meters of the building.
(Bayer 'Media Facade' video)
If you're a true-blue sf movie buff, you should be thinking of this scene from the 1982 Ridley Scott movie Blade Runner, where advertisements (typically to entice viewers into considering a life off-world) cover the buildings. (See also the Blade Runner video clip from which this scene is taken.)
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Illustrating Classic Heinlein With AI
'Stasis, cold sleep, hibernation, hypothermia, reduced metabolism, call it what you will - the logistics-medicine research teams had found a way to stack people like cordwood and use them when needed.'
Deflector Plasma Screen For Drones ala Star Wars
'If the enemy persists in attacking or even intensifies their power, the density of the plasma in space will suddenly increase, causing it to reflect most of the incoming energy like a mirror.'