This movement is inspired by the Victorian industrial era. It representes the future (post acopolips) based on Victorian era technologies. You can see this in computer games and recent films (BIO HAZARD, STEAM BOY), I believe that this movement stems from a post goth inspired sub culture unhappy with present day. One of the first examples of this genre is the book twenty thousand leagues under the sea where you come across the nautilus submarine which has technology far ahead of its time. Because of the media appetite for the movement it has attracted a large following.
Steampunk movement - 1ESB ALMA