China also has large swaths of it's population still in a lower income bracket, especially the further you get from the coasts (though the demographics there are not much better). It's going to be very interesting to see what happens over the next few decades (and by interesting I hope in not a terrible way).

One of the theories of China's recent, intense sabre rattling is that demographically they'll be in no position to militarily take Taiwan in 20 years. So it's now/soon or never.