Why are CEOs allocating more of their valuable time to thinking about their supply chain?

We live in a time of incredible technological progress. Self-driving cars and self-flying drones have already arrived, and more intelligent machines are surely just over the horizon. For many in the supply chain management community, the next big technology is the "control tower". Millions of dollars have been spent marketing the idea that a control tower is the "intelligent" system of the future and the solution to your problems. What is a control tower and should you invest in one?