Heinlein has a preface to one of this story collections where he claims to not be making predictions about specific dates, but rather is aiming to put many of his stories on a shared timeline for the coherence of his imagined future.
That said, he was also obsessed with 'hard' science fiction and attempting to create plausible technological what-if scenarios.
That said, he was also obsessed with 'hard' science fiction and attempting to create plausible technological what-if scenarios.