First, it is not a sustainable model to expect developed world households to consume ever higher volumes of the output of Asian factories with borrowed money. That model cannot return, which means that the imperative to find domestic sources of growth is not just a cyclical one.
Second, the eventual sheer size of the Asian economy is such that it will have to absorb more of its own output as it continues to grow. Continental-size economies such as the  BIS central bankers’ speeches  5  United States and the euro area have long done so.