If gas were so expensive in the U.S., other options could finally begin to take precedent. At 8 or 10 dollars a gallon, biodiesel would suddenly become highly attractive. Actually, they can now grow biodiesel from algae. It doesn't pollute so badly, and diesel vehicles get better gas mileage and need less maintenance. Tesla might could quickly develop a mass consumer electric car.
My parent's electricity provider gets 85% of the electricity from wind. The U.S. has lots of petroleum, and so does Mexico and Canada. We could easily pull out of the middle east and leave them all hanging if we wanted to. Unfortunately, a small cadre of rich people does not want something like this to happen. It's what should happen, but of course, that would just make too much sense.