I think the biggest threat China poses is an economic one. They are building nukes, and I believe have ICBMs, but the one thing they cannot do is project their Army anywhere far away. Locally, maybe. That's why our military (IMO) is so great. We can project it quickly, and overwhelm you quickly too. China may have the numbers, but we have the technology (at least the stuff they haven't stolen or reverse engineered yet).
