Every couple of decades the scare brigade starts clamoring in the US. The US survived the Europeans, the Japanese, etc. eating its lunch; it will survive the Chinese and Indians too.
The US has something that none of its competitors do: a free and open society, where entrepreneurs can flourish.
I have Chinese friends who went back to China and started companies in China; but they made sure that they had kids here first, so that the kids could be American citizens when they grow up. Were it not for the PRC's protectionist policies, many (most?) of the Chinese "success stories" would not have happened.
This is not to say that the US doesn't need to do more. We need to spend more on our universities, our schools and our infrastructure. We need more stress on science and math, and less arguing about "intelligent design". Keep the friggin religion out of our schools, let the kids learn.