As a note on this, I just reread Neuromancer, and the bulk majority of it takes place in places that are not “high tech/low life” locales. People remember Chiba City, but that’s chapter one, there’s a whole rest of the book after that.

Very likely.

However, I see two problems with this: one, I think people are going to make comparisons to Matrix rather than Blade Runner, and judging from the trailer it looks a lot like a modern Matrix (understandably!). Second, Neuromancer starts with "the sky above the port was the color of television, tuned to a dead channel" so the grey/"not sunny" look is kinda baked in and hard to avoid ;)