Can that continue forever?
I'm not sure that will come back in the same way because I think there will be a lot of pressure from both sides:
* the most advanced countries have seen how quickly that edge can be lost if you outsource to this extent, which could lead to more proprietariness and a desire to enlarge gaps in absolute lifestyle instead of short-term cost-minimization; especially if armed conflict stays hotter than it was in the 90s
* on the other hand, if closing labor cost and standard of living gaps continue in the future, globalization makes less sense because paying the logistics penalties and shipping costs in a world with more-or-less equivalent labor costs everywhere becomes stupid - sooner or later you run out of cheaper places to outsource too. Both knowledge work and "real-world" production benefit from short turnaround times and easy communication, so barriers based on specialization alone seem very hard to maintain in that world, especially across countries where IP restrictions often aren't enforced that strictly. Outside of raw materials, what do you need from halfway across the globe that none of the millions of people within a few hundred miles couldn't figure out how to do or copy?