I doubt very much that we’ll ever stop drilling for oil entirely, even if we do move to an economy that is so entirely oil-dependent. It’s simply got too many other uses. Even assuming that we do, eventually, reach a point where all oil production in the world is shut down, I suspect it will be such a gradual wind-down that by the time the last derrick goes offline, only historians, SCAdians, and the like will even remember how important the stuff used to be.