We've had a few decades now to observe that the promises of suburbia simply don't hold up. What's sad is that broken families stressed from both parents having to work jobs to hold down a mortgage for the perfect suburban home, consequently eating into the time they would normally enjoy being a family, and epidemics like obesity which are more rampant in suburbia than in many major cities in North America, have done little to get people to wake up to the reality that suburbs suck. But you know what probably will wake people up? High gas prices and an imploding real estate market will.
This TED talk sums up my thoughts on suburbia quite well: http://www.ted.com/index.php/talks/view/id/121