If America begins to use energy sources other than oil, what happens to the countries that depend on oil...?

What happens to these incredibly populated, oil revenue dependent countries? If we spend 750bil a year on oil imports what happens when we turn off the spigot in the next 5 to 10 yrs or sooner? The ramifications are almost unfathomable. Do we expect Russia to change their economy so quickly. Will we let the middle east starve? This is the delema of our time. Oil has built so many lives all over the world and within a matter of a few years it will end. Apocalyptic indeed.