This is an interesting way of looking at a set of markets. It would be interesting to know where the overlap is. For example, Apple sells OS and retail music (amungst other things). Amazon sells retail music, but no OS. How many people shop for music exclusively on iTunes, or exclusively on another site, vs. people who shop multiple sites.
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.