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1/n One of @gwern's best essays ever is a review of a book nobody has ever heard of.
It's about looking into the future, seeing exactly what awaits us, and being unable to capitalize on this knowledge, because you only know *what* will be and not *when* it will be.
VoIP! 100s of telecom startups tried/died until @Skype showed the time was right: Moore finally added mics/speakers to computers, signal processing, connections to carry compressed voice, IM UI, payment systems.
Now VoIP is just a freeish API call
