Another thing they got right was the merger of governments, large corporations, finance, intelligence agencies, and globalized organized crime into one big sprawling mass of Machiavellian nihilists scheming for power. None of these people really believe in anything, though sometimes they pretend to as part of some power play.

Gibson in particular nails this, especially in his original Sprawl trilogy. This sprawling mass is what he calls "biz." It's "just biz."

I sometimes wonder what's really happening here. Maybe with our large scale and large population we have exceeded Dunbar's number and the individual human cognitive "context window" so much that coherent social systems are no longer sustainable. Any kind of principle, rule of law, or sense of national or cultural identity requires that coherence. Without it the system dissolves into this random churning stew of scheming, money, and power.

On a personal level it means you have to find these things in your personal life and the family and community you build around you, and you should not look for or expect these things from larger scale social structures. They can't deliver them, and the reasons might not just be "corruption" or "people are assholes." They might not be able to deliver them because we have exceeded the scale on which human social structures can coherently operate.

Gibson depicts this too. His world of the Sprawl was bleak but there were pockets of people who had created what amounted to intentional communities within it. I'm thinking of the Afro-American-futurist arcologies in Count Zero or the orbital subcultures like the Rastafarians. Some of the subculture around the "console cowboys" also counts.

EDIT:

Another gigantic correct prediction of Gibson that nobody remembers is that he predicted that the AIs would make art. As far as I know he's the only one to predict this. The usual depiction of AI in pretty much all other sci-fi was as only logical, whether benevolent (Lt. Cdr Data, Enterprise's AI, droids in Star Wars) or malevolent (Colossus, Skynet, Dune's prehistory).