I read a book of his once about theoretical ways to make sci-fi technology a reality. It was interesting in a hard sci-fi kind of way, but what really annoyed me was that he kept presenting his ideas as how they would work rather than how they could work.

Just looking at what people 100 years ago thought life would be like today should be a good indication that while theorizing about the future is interesting and a good way to get ideas moving, future technology is never going to be exactly what you think it will. If we knew exactly how this stuff would work, we wouldn't be imagining it, we'd just make it.

How so?

well thats disappointing, I just bought one of his books in an attempt to understand quantum better