Pop quiz: What's the hottest consumer tech startup to come out of Silicon Valley this year? If you struggled to come up with an immediate answer for the next Facebook or Uber, you've identified the current climate in America's longtime capital of innovation. Sure, there's plenty of money and brains in San Francisco. But in a place constantly looking for the next big thing, the lack of a new breakout gadget or app can be deeply unsettling. Some even wonder if Silicon Valley has become ... boring.