I think it is only inevitable that China's economy will surpass the American economy, China has rapidly modernized their economy and has the worlds largest population, I think as long as the Chinese economic system stays stable then it will rapidly bypass the American economy in the next decade, I don't think this is a bad thing for the US since we have a strong trade relationship with China.
I can't really say that China's economy will surpass the economy here in America for sure, but I think that it has a likely and reasonable opportunity to. One of the reasons that their economy is doing so well is because we have outsourced many of our jobs there and we buy their cheap products.
The Chinese out-number the United States almost 4 to 1, and if their economy continues to grow, the GDP is only a matter of years from passing the United States. Still, the Chinese income per capita is terribly low and most of the peope live in absolute squalor with almost no disposable income.
Though the American economy would seem to be doomed to die as it has little production along with a huge trade deficit with China and a dying petrodollar, what really matters, food, is mainly produced by the United States. The U.S. feeds food deficit sensitive China, and the Chinese must eat. Without America's food, China would starve. America has a HUGE trade advantage as China is dependent on the U.S.'s food. Consequently,China has to sell to America to buy America's food using America's currency. With China dependent on the accumulation of U.S. dollars, the American economy has surpassed and will probably not be surpassed in the most important sense.
I do not believe that the economy of China will ever surpass that of the United States of America's. It think that while China's economy is growing at an amazing rate, I do not think that it will ever become greater than that of America's. I also think that a lot of China's numbers are artificial
China is large. China is growing. China is certainly an economic force to be reckoned with. However, economy is, essentially, a function of government, and China's government leaves much to be desired. A fundamental aspect of an economy is people, and people require a certain level of solidarity. China's significant lack of human rights creates an ultimately untenable situation for its workers, regardless of how many there may be. I believe that economic collapse, though possibly far off, is inevitable.