No real surprise here--except it will happen long before 2030--
Intelligence community: U.S. out as sole superpower by 2030 - POLITICO.com: "A new report by the intelligence community projects that the United States will no longer be the world's only superpower by 2030. "In terms of the indices of overall power – GDP, population size, military spending and technological investment – Asia will surpass North America and Europe combined," the report concludes. “Global Trends 2030: Alternative Worlds" — prepared by the office of the National Intelligence Council of the Office of the Director of National Intelligence — projects that the "unipolar" world that emerged after the fall of the Soviet Union will not continue. "With the rapid rise of other countries, the 'unipolar moment' is over and no country – whether the U.S., China, or any other country – will be a hegemonic power," the report argues. "The United States’ relative economic decline vis-a-vis the rising states is inevitable and already occurring,but its future role in the international system is much harder to assess," it argues. . . . "A collapse or sudden retreat of US power would most likely result in an extended period of global anarchy". . . ."
more news below