Interesting talk by Amory Lovins (sp?) and he was talking about two photographs of the NY City Easter Parade. Rough idea here, not sure of the exact dates, but one was from 1903 and the other was from 1916.
In the first one, if you look closely, it looks like there is something way back in the photo that might be a car. If you look at the second one, you can see way back in the photo a horse. So basically he said "Thirteen years from first car to last horse."
Not quite of course, because we have horses in parades today, but you get the point. He was trying to say that when a technology hits the point where it is affordable, things move very fast. He had some other stat about how car ownership went from almost nothing to something like 70% of households in 15 years because Ford dropped real costs by 2/3.
Even more interesting when you couple this with the fact that urban people are increasingly opting out. Did you post that link that 9% of people who sold a car this year said they were not replacing it and were switching to ride sharing and car sharing?
