Well said, Mike. I always look at Europe to see where our country is headed on various issues. Europe is dominated by trains, buses, and subways. I see no reason why our major cities will not be the same way in 35 years.
In regards to technology costs, look at how far we have come in just 10-20 years. Previously, cell phones and GPS satellite tracking were a military-only option. Well, military-only OR pay and arm and a leg for it. Now, everyone with a smart phone has tracking down to 3 meters for around $100/mo and can call anyone on the planet from wherever they are in America. Plus a TON of other incredible features. That is mind-boggling to me!! This is technology that went from 1% of the population to over 90% of the population in 10-20 quick years.
I see no reason why vehicles will not continue this trend. Sure, driverless vehicles are cost-prohibitive now and fairly untested. However, given 35 years and the exponential speed of technological innovation, I see no reason to argue this prediction.