The best of cyberpunk conveyed huge cognitive loads about the future by depicting (in best "show, don't tell" fashion) the interaction of its characters with the quotidian minutia of their environment. In the way they interacted with their clothes, their furniture, their decks and spex, cyberpunk characters told you more about
the society they lived in than "classic" SF stories did through their interaction with robots and rocketships. Postcyberpunk uses the same immersive world-building technique, but features different characters, settings, and, most importantly, makes fundamentally different assumptions about the future. Far from being alienated loners, postcyberpunk characters are frequently integral members of society (i.e., they have jobs). They live in futures that are not necessarily dystopic (indeed, they are often suffused with an optimism that ranges from cautious to exuberant), but their everyday lives are still impacted by rapid
technological change and an
omnipresent computerized infrastructure