Article is long, but thorough, but it misses one key preceding influence -- the feminist and new wave sci-fi authors of the 60s and 70s. In particular, it's not difficult to see the roots of Cyberpunk in the works of Le Guin, Joanna Russ, James Tiptree Jr, J. G. Ballard, etc. all contributing to create fertile soil for Cyberpunk as a genre.
The works of those authors imagined sexual liberation, drug use, environmentalism, new sexualities, and the influence of technology on daily life. While none of them wrote things that were themselves cyberpunk, they had an essential role in driving genre to where it could begin. (And indeed, one of the most prominent figures in the genre, Bruce Sterling, once credited J.G. Ballard.)
I see so many people loving Gibson and crediting him for inventing the genre whole cloth, but of course he didn't! None of us write anything without standing on the shoulders of those who came before, building on the works and ideas of those that came before. It doesn't diminish Gibson's accomplishments to talk about what he might be drawing from, at least for me, it adds a richness and a thing to go and explore and try to understand what the natures of the world was during the time those books were being written.