it’s a very dull over rated film.
No, it isn’t. In fact, it was pretty much ignored for years, it’s only over time that it’s developed such a strong following, which had nothing to do with film critics. Who know nothing anyway.
The book which most closely resembles RS’s vision for Bladerunner is William Gibson’s Neuromancer, which was published two years after the film came out. I’m not certain if there was a direct influence, Gibson writes so slowly that it could well be the two were running in parallel, just a coincidence, something in the water, as it were, that there are similarities in the cities in the film, and Gibson’s descriptions of BAMA, the Boston-Atlanta Metropolitan Axis.
He’s given up writing such speculative fiction now, he can’t keep ahead of how real technology is actually moving.