On the one side, it has succeeded at reducing costs, which has indeed given rich societies unprecedented access to consumer goods.
On the other, it has outsourced from us both jobs and knowledge, which has resulted in higher unemployment and dissatisfaction, with as consequences the political dominoes we see falling internationally. That and the shoddy US health system (which the rest of the world seems to have decided to follow, for some reason).
And there is the small fact that we're in the process of optimizing the planet to death, and that not-so-rich countries (as well as formerly-rich ones) have starved to death for this high standard of living.
So, let's appreciate our standard of living, but not assume that it's necessarily a good thing in the grand scheme of things.