Examples include Isaac Asimov’s robots, Robert Heinlein’s rocket ships, and William Gibson’s cyberspace.” He called these examples hieroglyphs: clear, inspiring symbols of what a better future might hold. William Gibson writing about a better future? That's not what I saw in his books, but great science fiction doesn't have to portray a better future. In my opinion, great science fiction doesn't have to follow dogma,…
> In fact, The Martian was so modest that it may not have qualified as sci-fi in the first place. Cory Doctorow, another one of Stephenson’s Hieroglyph collaborators, uses the term “design fiction” to refer to works like Weir’s. But whatever you call it, The Martian’s space-hackery certainly couldn’t have inspired anyone “to develop new technologies and implement them on a heroic scale.”
The author is saying that Weir's Martian lacks a hieroglyph, which is to say that its problems are too narrow, too local, too provincial. It's missing inspiration on a "heroic scale."