MobBoss, oil production has nothing to do with scarcity. We'll agree that there's a finite supply of the stuff, and a finite supply of the stuff at any one time. By any measure, it fits the defintion of 'scarcity'.
Oil is already scarce. A good is scarce if not enough of it exists to satisfy everyone's desire for it, and therefore requires some price to allocate it. Oil has always been scarce. The price of oil is the best indicator of its relative scarcity, and the price has been going up a lot since 2002.
Agreed (though there's currently a terror premium). Oil will continue to get more and more scarce, and will be phased out with alternatives. Fifty is right that he might be running his car on vegetable oil someday.
Access to alternatives will be based on the price of oil; the higher the price, the more alternatives will be presented.
Now, there's an amusing scenario that could happen. Once alternatives come online, market efficiencies might kick in to reduce the price of alternatives. This would result in the price of oil coming down, not because of 'real' supply, but because of lack of demand.
Of course, our economies are very tied to the price of oil. Outside of global warming, the cheaper the energy is, the better off our societies are. (This is why I condemn wasteful energy usage as unpatriotic). Even factoring for global warming, repairing the damage done by CO2 emissions is easier if energy is cheap.
So, long-term, we're best off spending our oil wisely and frugally. This is true regardless of how much there is left.
Of course, there are others who espouse that spending oil as fast as possible is superior, because it's then denied to others who might benefit from it.