If left to the status quo, expect the China/Eurasia Alliance to overtake us in technology within 10 years, maybe sooner. Take it from someone who has been all over there many times.
In what kind of technology?
I don't mean to be a Pollyana, but I'm seriously curious to hear what kind of realistic military threat China poses to America. The most I can come up with is an invasion of Korea, and that itself would be a huge mess that would push China's military to the limits.
America has always overcome its opponents. We will prevail even in the face of this. If not we will just take our enemies down with us.