Remember those “Arcos” in Sim City? It’s a concept of building up rather than out in order to maintain a high global population without everything ending up like Soylent Green.
It seems very similar to the cities in Miyazaki‘s film Laputa and his music video “On Your Mark.”
I found this information with help from Dreaming of a Better Place.
A quote:Arcologies were invented by Paolo Soleri in his book, Arcology: The City in the Image of Man
Web link of note: Arcology
(At http://arcology.com/)