I think that's the key point. As the emerging economies demand more and the the reserves become harder/more expensive to get to, it will surely affect prices - probably sooner than later. So while there might still be plenty of crude underground, if the pumping -> production -> refining costs result in a price to consumers of (say) $20/gallon for gasoline, that will have a shocking affect on most of the economies around the world.
Devoting more resources to R&D on things like cellulosic ethanol just makes sense (IMO). But with the "
Drill, baby, drill!" crowd now gaining more influence (again), I don't expect that will happen. We will be at the mercy of unfriendly Middle East (and Latin American) interests for the balance my lifetime, I'm sure. Although the Canadian oil sands might pick up some of the slack.
Full speed ahead. Damn the torpedoes!