Relativity was not really "news", Einstein himself said he created that by "standing on the shoulders of giants" like Newton, Maxwell and others who came before him. His real breakthrough work came after, with the Special Relativity work. He almost created a whole new branch of mathematics just to explain the physics of it. Perhaps that is the dream of which you speak of ?

I've heard that dreams are what we see from our subconscious work in processing the facts and emotions we ran through the day. So in this sense, we could never see the future on them. Yet we do. Curious thing the human mind!