I've been watching the news, and I read Mr. Clarkson's, and Mr. May's articles, in the Sunday Times and The Telegraph every week. I think with the current economic crisis going on in England, the USA, and many other countries, there should definitely be a "do it yourself" vehicle segment. I picture it being similar to the jet powered bicycle, or the Vietnamese improvised vehicles, both of which Clarkson has covered before. Obviously the vehicles would have to be road legal, but that's it really.
Perhaps it could also include something with old cars, like the Model T (or perhaps something that hasn't been reviewed), that were once inexpensive and efficient, and to some extent, still are today. Maybe it could then loop around to some modern economy cars, pointing out that even though the Smart car is kitch and trendy, there are many other cars that get close to the same fuel economy, and that you wouldn't have to saw one of your friends legs off to put them in the back. Since it seems that everyone may very well be broke soon, some practical thinking for the masses might be a good idea.
Don't get me wrong though! We still need to live vicariously through the lives of Jeremy, James, and Richard, and the Super Cars they drive in ways that most of us can only dream of.