As everyone knows, the trend in manufacturing has been to move factories which use menial labor to poor countries to take advantage of lower wages.
But what happens when robots can perform menial labor more cost effectively than any human, no matter how low the wage? (As explained in my previous robot post.) When this happens, the most sensible place for manufacturing will be close to the capital and the consumers. Developed countries will see a resurgence in manufacturing.
Just as unskilled laborers in the United States and other developed countries will be without jobs, entire nations which currently have a high ratio of unskilled labor will become even more impoverished. In other words, the higher the result of the formula,
unskilled labor / (skilled labor * w1 + capital * w2 + natural resources * w3)the worse off a country will be. The Robot Revolution will cause the rich countries to get richer and the poor countries to get poorer.