From Jane Jacobs, on the way transformations come out of weird sectors.
Even the most startling cultural and economic developments do not arise out of thin air. They are always built upon prior developments and upon a certain amount of serendipity and chance. And their consequences are unpredictable, even to their originators and the pioneers who believed in them and initiated them. After all, the first financially successful railroad in the world was an amusement ride in London. Many of us remember when plastics were useful for little except toys, kitchen gadgets and decorative touches that taste-makers derided for their vulgarity. That was before strong, lightweight plastics, reinforced with fibers of glass, boron or carbon, replaced metals in the making of springs and joints. These plastics transformed serious spectacle frames like mine. At last I have frames that never hurt my nose and ears and that last for years without weakened joints. These plastics were originated by the makers of tennis rackets and of rods for surf and sport fishing. nyt
While this sounds like disruptive innovation, Disruption is Real But Rare
Source: From Toys