The more I read about this, the less mysterious it becomes. I guess some people have an interest in making it so.

Every example I've seen employs the ability to react to some kind of stimulation. We do that now....so far on a limited scale. It's only natural that we wanna do a lot more. It's not IOT....it's the Nature Of Things.

I guess the internet makes it possible to do much more than individual actions. :>)