George Kim writes:
Even if somehow you have managed to set up a decent city scene, it's another--often far bigger--challenge to occupy them with pedestrians and people and moving traffic, often requiring an experienced team of artists and expensive third-party tools. But ... what if your computer makes them all for you within minutes using Blender?
Check out "Citigen-Ultimate"--a megacity-generator Blender addon equipped with moving people and traffic. Designed for long-distant shots, you can easily obtain believable short clips (each a few seconds long) of aerial city shots.
It's available at Blenedermarket
(Citigen-Ultimate is a variant of "Citigen" addon, which can be upgraded to the Ultimate version)