Going to be "that guy" and say that almost everything he accurately predicted was already commonplace or on the rise in the 1920s.
- Commercial flights had started a decade earlier. There were even successful transatlantic flights.
- The women empowerment and feminism movement was in full swing. Women had just got the right to vote. A large percentage had careers and even unions.
- Wireless radio and telegraph were established in most parts of the world.
- Cinema, with sound and color, was already a thing.
In fact he missed the mark on his actual predictions – food pills, paper mache furniture, no private dwellings, glass domed cities, nationalized industries in the US, no more opportunity in the US (funny since we are on a SV entrepreneurs forum right now).