And I am also reminded of the theory presented by Mark Thornton in The Skyscraper Curse: https://mises.org/library/skyscraper-curse-2 - Yet another harbinger?
But also I wouldn't call blade runner steam punk. I think it was more influenced by the actual urban blight in the 1980s. The gentrification white return trends were not foreseen, so it was assumed there would be more hollowing out.
Then again, that the big pyramids are downtown, and not in Anaheim or something, defies that explanation. Contrast is abhored both by suburbs / white flight / gated communities which seek to flee and hide wealth, and the modern trends of urban neighborhoods being uniformly more wealthy than they appear.
Blade Runner's architectural aesthetics are art deco and brutalism.
https://en.wikipedia.org/wiki/Mayan_Revival_architecture https://en.wikipedia.org/wiki/Ennis_House