In the foreword/prelude to Burning Chrome Bruce Sterling talked about "the victims of the new". What he meant by this was that William Gibson's stories were powerful because they were about the people who technological and social change had left behind. They weren't about Ralph 124C 41+; they were about the people who had been chewed up and spat out by the Future and had only two choices - to go down, or to go out. In other words, his stories are about the potential D&D adventurers of a possibly imaginable future: rogues, brigands and no-hopers who will never get a real job and whose only prospects are having nothing to lose. The kind of people who will end up at that deep dark dungeon - or oil rig archipelago - with a plan to get rich or die trying.
Tie these two notions together and what do you have? A compelling reason for Mike Pondsmith to make Cyberpunk 2020.