I know it's sad, but I want one - OK, maybe I really just want to try one, but I love the concept of the build.
I think the important thing to remember is that the car itself is a strangely small part of the design efforts. From my memory of the programme there is now a more efficient production cycle materially cutting manufacturing costs, a new approach to small car chassis design, a genuine mass production opportunity for a truly international vehicle (centre driver).
I'm sure there were many other specific developments, but the memory ain't what it was (actually, I don't think it ever was...), but the way I look at the car is that with all the process and material developments to come out of the design cycle it is almost a proof on concept. I would have one purely because of the way its manufacturer looks at the world, but it could easily spawn a new generation of city car.