* The corporate market often prioritizes speed and ease of doing business over the absolute rock-bottom cost. Local manufacturing offers advantages due to a much shortened supply chain.
* The gap between an hourly worker's wages in the US versus China is shrinking, due to Chinese labor inflation and US collar wage stagnation.
* The hours of labor per assembled unit is declining due to advances in automation, rendering regional labor variances less important.
Labor is becoming less of an issue while local manufacturing continues to have major supply chain cost benefits, so Lenovo considers that the scales have tipped enough to justify a US presence for the market segment that values that responsiveness the most.