Imagine a swarm of IoT devices. They do not possess strong CPUs and not only have little local persistent storage and not much RAM, but with their weak network connections some are not online at all times. At the same time they provide a powerful platform. You may argue that the power comes from their number. I believe that it originates from the fact that they are connected. Assuming, for the sake of the argument, that it is true, it means that the communication channel is a cornerstone of any IoT-based solution.
This is a companion discussion topic for the original entry at https://mender.io/blog/websockets-for-fun-and-profit-a-communication-channel-for-the-iot