[Porsche-O-Phile]

There's way too much money made by government from having people driving to just give up on it. They make money on:

Car purchases
Car registrations
Driver licenses
Traffic tickets
Parking fees
Parking tickets
Tollways
Peak hour usage (UK, possibly others)
Fuel taxes

And there are indirect interests (big banks funding car loans, insurance companies, etc) by huge industries who can afford to buy off politicians to the point of influencing or even shaping policy.

In short, it'll be a novelty for a few but the conventional model (with all its associated money) won't ever go away. No chance.