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In less than five years, Facebook has also built an enviable ad-technology infrastructure, a huge sales team that aims to persuade marketers of the benefits of Facebook ads over TV ads, and new ways for brands to measure how well their ads are doing. These efforts have paid off quickly: In 2014 Facebook sold $11.5 billion in ads, up 65 percent over 2013. Google will still make a lot of money if it doesn't dominate online ads the way it does now. But it will need to find other businesses to keep growing. This is why Google is spending on projects like a self-driving car, Google Glass, fiber-optic lines in American cities, space exploration, and other audacious innovations that have a slim chance of succeeding but might revolutionize the world if they do. But the far-out projects remind Thompson of Microsoft, which has also invested heavily in research and development, and has seen little return on its investments. "To me the Microsoft comparison can't be more clear. This is the price of being so successful — what you're seeing is that when a company becomes dominant, its dominance precludes it from dominating the next thing. It's almost like a natural law of business."