That's right. In the super long-run steady state, what matters is population size (along with wealth and industrial production). If the US can maintain the status quo of the US having a slightly bigger economy, and just buy time for the US population to grow via immigration while the Chinese population declines, then eventually the world will be back to the geopolitical reality of the 2000s with a unipolar world with the US on top. China will still have revisionist and irredentist intent but won't be capable of carrying it out, and the US policy of containment will be successful.