The way that car design is going the cars are all becoming hybrid, everything on them is becoming more contrived and artificial (exhaust noises through the stereo, over engineered gear shifts), it is probably the natural way things will go anyway. Power delivery is becoming much more linear and dull, you don't have to drive a car in the way you used to. Some people don't even like a manual gearbox any more.
So long as the plans for power generation and energy storage are done alongside it then it should be OK from a transport point of view. Given how battery power is moving forwards now there will always be the potential to make the cars faster / different in the same way that there is now, although how much will actually be achievable due to the different technologies involved is anybody's guess.
It will be interesting to see what the last of the petrol engine cars will be like, will the companies want to go out on one last great triumph or will the legislation on everything have been tightened up so that they just can't make anything that isn't a turbocharged petrol electric hybrid by then anyway?
I do feel very privileged that I have lived and owned cars in what seems to me at least to be a fantastic time for car design and performance. I have witnessed the ongoing development of the petrol engine to what almost became an art form before it got gradually corrupted by the tree huggers and bean counters.
The sale of new petrol cars is being banned, but I assume it will be another 20-30 years before they are mainly gone from the roads. Given then I will be just about to turn 70 by the time the ban is introduced, the ban in itself doesn't concern me greatly and to be honest I can see that all of the car manufacturers have already started on the slippery slop to get there anyway.
MC