One of things the energy analysts talk about at my company is the breaking point. It's the point where a certain price causes immediate change in behavior and results in true change and new technology.
Unfortunately, we're not their yet. The general consensus is that it starts somewhere over $5 per gallon... probably around $6 or $7. At $5 you can still do the simple math in your head and you're still thinking of it as a single bill. Beyond that, the math gets more complicated, one gallon requires a $5 bill PLUS a couple of singles, and that just resonates in an entirely different way.
The US is very much like a big freight train or large ship.. we get a lot of momentum in one direction and it takes a serious effort to change direction. Once we do, we will slowly gain that momentum back.
I completely believe the answer to energy is out there, there just hasn't been the right kind of motivation to find it. Like the atom bomb, the government will at some point setup a Manhatten Project style group of the smartest most innovative people and they will figure something out that will revolutionize energy.
You can very much argue, however, that if we and others became energy independent, it would start the next world war. The middle east has no exports, no industry, no revenue of consequence, other than oil. The world could become completely destablilized over night. It's a lot more complicated than just making a gizmo that let's you fill your car up with the garden hose.