Until the inconvenience of driving exceeds the benefits of riding a PTW, most people are just going to drive. Yeah, a few of us are trendsetters, but most people are lemmings and not risk takers. They can't see the big picture. I've always maintained that if urban cities really wanted to get people out of cars, the easiest thing to do is making riding scooters and motorcycles exponentially advantageous over driving a car. For example, something like free street parking for bikes would be HUGE in Chicago and make a lot of people get out of their cars, particularly when parking can cost you $200/month or more. Make filtering / lane splitting legal. When cagers see bikers able to shoot to the front and save some real time, again, it makes riding a scoot that much more advantageous.
Right now, I ride because I enjoy it not because there is any real advantage over just driving other than saving a little on gas.