Shadowrun/Cyberpunk (og) were right. Arcologies are on the way. Corporations are gonna have standing forces and fight each other. Most city people will be forced to move to an even more miserable existence, as DAs, legislators, executives, do everything they can to increase crime and lower property values so they can snatch it all up for their corporate masters. Eventually each mega city will be owned by a single corporation, with rivals, and 'nations' having to rent corporate embassies.