Are you sure about that? Japan is still losing population and this won't stop until they've reached some 70-80m citizens which means the GDP will quite likely shrink in the next 3 decades.
And India looks to me like just another Brazil.. everything in the future, but nothing in the present - well, except for population growth, which consumes the productivity.
Lastly China, which might end up growing old before it grows rich. But then again, Martin Armstrong says it too: It's going to be China. The West drifts into the oblivion of another Middle Age and China takes over the helm.