If anyone wonders why future cities are gaining attention at the moment. It is possible that apocalypse bunkers are boring concepts to many of the rich and famous. People may not be well adapted to living a solitary existence locked inside a survival bunker for prolonged periods of time. They would prefer to have apocalypse cities where they could retain a vestige of social life and have others to interact with in a catastrophic scenario. It is also possible that having access to a panel of experts inside of a community would increase their chances of survival.
Its possible these futuristic city plans are designed and structured along an avenue of organizing a community of survivors under apocalyptic conditions. ~
In my opinion, the first thing you need to survive under apocalyptic conditions is a good army equipped with heavy weapons. I don't think there is any futuristic city designed with that in mind (CMIIW). Unfortunately, there are still organized military groups acting like weare living in the Stone Age. They end up miserably when confronted with serious force, but you have to have that force.