Oh, they'll spread out, just wait. The Chinese workers will soon be demanding higher pay and the 'middle class' will appear. This will open even more business opportunities and they'll start expanding.
It's not just immigration. It's too late, btw. There are enough Spanish speaking people who are already citizens of USA. Taking that 'critical mass' into view, I doubt WASPs would be able to assimilate all of them.If all states pass a law on immigration like the one in Arizona, I hope that will never happen.