Unless technology itself is drastically repressed, the idea of the dystopian monoculture like Orwell's 1984 gets harder to believe. But the danger of a solipsistic society will grow, of a disconnected society of mirror-watchers and navel-gazers.
If you're writing fantasy or science fiction, it's really hard to do if you don't know a lot, at least in a basic way, about how the real world works.