How about a "robot" beating the world's best chess player after 1/2 days worth of training or the ability to virtually cure HIV/AIDS (that certainly seemed impo

How about a "robot" beating the world's best chess player after 1/2 days worth of training or the ability to virtually cure HIV/AIDS (that certainly seemed impossible in the eighties) or music without instruments or singers and only wildly flashing lights (the value of EDM is debatable, but it would certainly feel futuristic to someone from the 60ies) or the ability to speak in real time video to someone on the other side of the world while taking a stroll through the park (star wars had holigrams, but they were pre-recorded material and not real time)