this is a puff piece documentary, but take a look at the scale of the consumer electrical goods manufacturing: https://www.youtube.com/watch?v=WlSHo61nRWw

I think what we will see is cheap ($5-10 max) IOT-like modules being integrated into all sorts of random consumer electrical goods. Whether your blender needs to speak bluetooth 4.0 and associate to your home wifi AP is sort of a moot point, at some point in time the modules will get so cheap that they're integrated by default into any device that has electrical power. Whether you need it or not.

How useful it'll be is another question. An IOT thing with a relay in every lamp?