The world is headed for a multipolar economy that will no longer be dominated by the dollar. This doesn't mean that the dollar will be going away any time soon, but it does mean that dollar based economy will shrink and with it the power that US wields over the world.
@yogthos The dollar being the world's principal trading currency has effectively allowed the US to extract rent out of everyone who traded commodities round the world, because they had to hold dollars in order to do so.
Of course, that rent-seeking opportunity is not disappearing, it's just switching to China. Big economic powers will always systematically benefit from market economies at the expense of the poor.