Imagine that you live on the 5th floor
And your office is either in your home or on the 2nd floor, or you work for one of the stores on the first floor, or maybe only a block away
And a mini-mall including a mega mart grocery is on the 1st floor
And on the roof you have a small garden where you can grow your own vegetables.
A doc in the box is a block away
A subway/train depot is two blocks away... it will take you where you need to go. It'll take some time, but that's better than sitting in traffic... and besides, gas is $10/gal and you can't afford that.
You don't need to own a car, but you can sign up to share one should you need one. Save up to go somewhere that's not evolved to the point your community has.
Your building has been designed or retrofitted to be energy efficient, so you feel good about the impact you have on the environment.
All the space that used to be paved has been returned to nature. Your community is surrounded by national reserves.
The air is clean
The water is clean
The river bed has not been replaced by a concrete. It's a nice place to picnic or stroll.
Basically the evolved human has encapsulated himself... to minimize his impact on nature. And we're all better off.
This is a world after peak oil. This is a world that has dealt with climate change. This is my dream.