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@cstross

And yet we have the iPad (2001 space oddity), Mobile phone (star trek communicator), video calls (Metropolis, 2001 , blade runner etc), Ear buds (Fahrenheit 451), robotic prosthesis (terminator) , Helpful robots, language translators , smart watches etc etc

Vast swaths of our current world are ideas we've had that takes a lot of effort to bring into reality. Why do you think these people become billionaires.

The difficulty is in the execution