In my mind, there is absolutely no doubt that China will overtake USA, and become the biggest and maybe even the most powerful economy in the world!
The fact alone, that they have a population that is almost 4 times bigger than USA.
Looking at the Chinese schools, and education system, they are probably the ones who have come the furthest, when you look at the skills that the children are learning at an early age..It scares me to see the education system in my own country, where the main focus is to get everyone through, not really taking care of the children who have special skills...making sure that the country is provided with a workforce with special skills...Another worrying focus is the teachers...their main concern is their salary..basically not caring about creating the best learn space for the children...That is where China i way ahead of us!
In the western economies, the workforces are paid too high salaries to compete in the long run...the chinese are able to hire three for the price of one..and they can sell the manufactured goods at a much lower price..
So in the long run, the western economies are being left behind...sad but true!