I can understand self driving cars eventually being practical on long simple roads. But I can't even imagine how one could get to my house. My road has cars parked on both sides. Sometimes vans. Sometimes they almost block the road. Sometimes there is a car coming the other way and you have to look for a space to pull into to so they can pass, or maybe back up 1/4 of a mile. Or hope the other car does. There are cone…
I can understand planes eventually being practical for transport, but the wind and noise and short distances they fly make them useless for passenger transport.
I can understand computers eventually being practical for business-y folks, but the rooms they take up make them useless for normal folk.
I can understand this internet thing is useful for nerds, but I can't see how regular people will ever use it.
I can understand a "portable" telephone is a nice idea, but the breifcase of a battery I have to carry around makes it's way to big and heavy.
... need I go on?
It's happening, whether you can imagine it or not.