Over the past 50 years we got versions of X-ray specs and space vacations and even death rays. But the X-ray specs don't fit on your face - they're big things that screen your luggage for guns. Space vacations are real but they cost $20 million. We have death rays but you have to be a triple Ph.D. to play with them.
Most modern science fiction went to school on 'Dune.' Even 'Harry Potter' with its 'boy protagonist who has not yet grown into his destiny' shares a common theme. When I read it for the first time I felt like I had learned another language mastered a new culture adopted a new religion.