I mean, for those areas, they're going to be sinicized, if they haven't already. I don't see how it'd affect Americans though.
I think you need to understand one thing: China is not capable of projecting its power beyond its shores and land for the moment. I think you are underestimating how much a lead America has in this area. What the USA has been doing, as the world police, for the past fifty years have not been replicated by any other nations to date, and for good reason: it's bloody expensive, and there is not much benefit in it. Unless you're American and you're driven by that weird mix of American morality and hypercapitalism.
China is also surrounded by unfriendly nations, all of whom would be more than happy to gang up on them should they start rattling sabres a little too hard. All this talk of China dominating the world is fanciful, and only the most ardent CCP supporter would even believe it.
What is more likely to happen is a return to the multipolar world of pre-WWI, and the interwar period.