Venture capitalists are always chasing the next big thing. Of late, they are struggling to figure out what that might be.
Nearly a decade has passed since the smartphone sparked a startup gold rush. Silicon Valley investors have yet to identify the next product that will spawn a similar wave of tech companies and lucrative returns.
Venture capitalists are spreading their bets across technologies where the path to profits is unclear, including self-driving cars, drones, artificial intelligence, virtual reality, even food.
