To Scott Williams, most drones are just toys. They can fly high and take photos and video, but can’t do much more. But his drones? As he sees it, they might change the world. “If we could put a flying cell tower [up] there, then we could do computing, we can do whatever right off of this thing,” said Williams. “We need a flying computer. We need this network that we can put anywhere and just let everyone compute off of it.” Williams and his 16-year-old son, Mac, were flying one of the prototype