I'm not saying that China's GDP can't surpass that of the US. I was saying that even if China becomes much stronger economically and military, can she realign Asia to create a new regional order? somehow I doubt this.
First of all, I think China needs to present a worldview that every other Asian countries would want to join and to strife for together with China. And this worldview would need to override any differences and frictions that currently exist between most Asian countries. Right now, I don't see China presenting any such worldview, other than the "let's get rich together" worldview which is pretty generic and trivial. On the contrary, China was previously pushing hard for an exclusive sino worldview (ie. The Chinese Dream) that are still embedded in people's memory.
I think the US had an advantage in that they've already created their current alliances and world order during the Cold War where there was an "imminent threat" from the evil Reds and their uniting worldview was "to build and protect our free and capitalist world." This worldview was inclusive and the need to fight against the evil Reds overrided any small frictions and differences the US Alliance members had with each other.
Now here is one reason why I think China is not succeeding in creating a new Asian regional order: The US is currently winning in presenting China as that "imminent threat" where countries like VN, PH, JP, etc, needs to unite with the US to protect themselves. In other words, the PRC is presented as the new evil Reds.