Based on other stuff I've read him say, I feel like he might actually indeed be implying that things like slums and the dominance of megacorps and the ultra-rich are to him more central/significant themes/aspects of Neuromancer than AI's or cyberspace! Or at least that they are more central/significant than people focused only on the cyberspace thing recognize.

Gibson had of course famously never used the internet when he wrote Neuromancer (on a typewriter).