> Who would weigh themselves down with a high cost phone in your pocket when there's one on the wall?
Anyone who sits in a place waiting. Put a phone a smartphone in their hands where they can look up the thing they're thinking about (or anything else on the net that they can access). Instant comprehension.
> Who needs a website showing pictures of goldfish when you can interact on a bulletin board?
Ask anyone to imagine what the bulletin board looks like in a geographical location far away. Then enter a URL for that far away location and receive the response in seconds (vs days of travel). Instant comprehension.
> Hard to predict which technologies get adopted.
That's true. For the two examples I gave above, there are many more where respondents instantly recognized the benefit but the technology still didn't take off.
However, that's beside the point. The point is-- what is the moment of "instant comprehension" for all of someone's appliances phoning home to a third party?
Edit: just to add another example. Someone does an hour commute to and from work. Put them in a self-driving vehicle. Now they potentially have two extra hours of concentration they can devote to something other than the road. Even if they're fearful of using it in the automated drive demo-- instant comprehension.