What was the quote? "People tend to underestimate the change that will occur in 5 years and overestimate the change that will occur in 50 years." Something like that.
This is their vision of what 1976 would look like in terms of personal transport back in 1956:
https://www.youtube.com/watch?v=F2iRDYnzwtk
All cars powered by a new clean energy, autonomous 'safe' travel etc. Sound familiar?
While the guys in the film may have wanted to sing about it and big companies like GM were pushing hard for it, it simply didn't happen in the following 20 years.......... and still hasn't in almost 70 years, in fact not all that much has really changed in terms of how we get about.
If I had one wish, just one, it'd be that engineers, car companies, 'concept companies' and especially legislators would stop telling people what they want and what they will want in the future. People by and large didn't want this back in 1976, they don't really want it now and I dare say they won't particularly want it 20 years from now. I actually don't think the kids in China, Africa or India will want an autonomous driving Bentley over a Ferrari or Lamborghini either but we'll see.
To this point engineers have largely failed to predict what the next generation or the one after than will want and the really big advances have largely been unexpected. Who'd have thought that many kids' most treasured possession in 2021 would have been their phone just 30 years ago before you could even text.
Engineers should concentrate on what people actually do want, not what engineers want people to want.