I'm already out of the car - I haven't had a car since I moved to China over 5 years ago. Right now I rely on my electric scooter (commuting 1 day a week plus grocery shopping and trips to the nearest Metro stop), my bicycle (commuting 4 days a week) and the Metro (any other trips I need to take).
However, my wife and I are planning to buy a car next year for non-commuting purposes (i.e. travel, shopping, etc) just because it will be more convenient to take our family around if we have one. However, I will not ever drive to work, because commuting by car has absolutely no advantages in Shanghai, and plenty of disadvantages.