It's shifting to wealthy capitalists in developed countries (well not shifting, they were always wealthy), as well as creating new wealthy capitalists in developing countries. There is some extra wealth for the poor, but you're right that it is an unequal distribution in developing countries.

But those aren't "already wealthy capitalists". They're "newly wealthy capitalists". End of the day it's the same thing - a few wealthy capitalists - but it's still more wealth in developing countries than before.

I'd argue that there is zero historical precedent for wealth not to be concentrated though. It's just the nature of wealth - wealth creates wealth, debt creates debt. And that's more of a universal truth than a capitalistic one, and more accurately described as 'value creates value', 'obligation creates obligation'.