SF authors generally make up their technologies based on the needs of the story they’re trying to tell, rather than based on reality, but the more “hard” science-oriented ones try to make their science as believable as possible too. This site seems to fit a common theme in this blog, of “track[ing] predictions and descriptions of the future made by scientist, technology pundit and science fiction author David Brin.” It looks like he’s got a pretty good track record too.