Science fiction has tended to be too optimistic in some places, and not optimistic enough in others. But sometimes they got it right. In the very first foundation novel published back in the 50’s Asimov predicted the pocket calculator. He was probably the only author that ever got THAT one right. Some future predictions were right on technically, but not practical or too dangerous in reality. Personal helicoptors were long seen as the future, but the vision failed due to the expense of the machines and how difficult they are to fly! Not every fixed wing pilot makes the transistion to rotor wing, because it takes talent (and lots of expensive hours in type)!
Back in the 50’s and 60’s the fear was we’d destory ourselves in a big atomic blast. Now we worry that we’ll simply slowly make the planet unable to support our species life kind and number. We’ve also come to realize just how lucky we’ve been not to have been wiped out by a rouge rock from space, or a super volcano eruption. So maybe we’ve tamed our vision of the future somewhat because we are now afraid that there might not be one.