I share your interest in car design but do not see private cars as being of much use in city centres.
Re London, I like the look of buses and taxis but, as a cyclist, dislike them. My present reason for being anti-car is simply that I am pro-cyclist and think British cyclists get much too small a slice of the roadspace and the transport budget (blog post to follow).

Cycling is great. But in a very postmodern way I am advocating for both! (Are you planning on abolishing the famous NY yellow cab too?)

Wouldn’t it be wonderful if they could all live happily together somehow?

On the plus side perhaps a carless/busless London would be a place with less IRA type opportunities?

Planners speak as though they believe cars to be bad and all public transport to be good. This has let some public transport become bad, notably diesel taxis and buses. They are big dirty bullies, so far as pedestrians and cyclists are concerned. Electric power would help with the dirt but not with the other problems. I heard a cynical taxi driver being questioned about whether he thought, with the Google navigation system, London would become a city of driverless cars. He said cycling was advancing so fast that there would soon be no cars anyway. If electric bikes become popular, as in China, he may be right about Central London.

At Southbank in Brisbane with the creation of the urban parklands they recreated streets which had ‘disappeared’. Perhaps the better solution would be to change the fuel source of the very famous red double decker London buses which everyone loves and copies?