Virtual cities are just starting to form. Many other commenters have pointed out working remotely, but it is still in its infancy. Once fully immersive VR gets

Virtual cities are just starting to form. Many other commenters have pointed out working remotely, but it is still in its infancy. Once fully immersive VR gets cheap/effective enough, and it's as common as iPhones, there will be no need whatsoever for people to physically be next to each other.