Most non-SF literature puts forward a concept about the future by describing it, while good Science Fiction illustrates it. For example, both Snow Crash by Neal Stephenson and Neuromancer by William Gibson illustrate what the Internet and the world might be like in the future, in images that are easy to understand. They illustrate ideas about justice and ethics and the nature of intelligence without putting the reader to sleep. I believe that Science Fiction is the natural way to talk about the future.