Biking is a great way to get around, especially in cities. The fresh air, the exercise, the lack of greenhouse gasses! The trouble is, there's basically no storage room on a bike. It's very difficult to go to the grocery store on your bike, for example. That's not the case with the Bullitt.
Bullitt is a bike, sure, but it doesn't look much like any bike I've seen before. In front it's got a huge cargo space, enough to hold all sorts of groceries if you so desired. Sure, it's probably difficult to store and not as maneuverable as a normal bike, but what are your priorities?