If history tells us anything, it's that the long-term impact of new technology is difficult to anticipate from its earliest applications. It took smartphones more than a decade to reach 80% of people in the US. One of the most important moments in smartphone adoption came in 2008, when Apple launched the App Store. What followed was an entirely new wave of companies. Uber, Instagram, and Spotify recognized what became possible when millions of people had a computer in their pocket. They…