Since you are asking the serious questions that much be asked, I’ll take the liberty of reposting the following link:
http://www.bcg.com/media/pressreleasedetails.aspx?id=tcm:12-144944
Boston Consulting Group has been leading the effort to educate businesspeople on the return of US Manufacturing and “reshoring” for the past two years or so. Their research reports with specific details as to why this is happening, which regions will benefit most, and which industries will be most affected can be obtained from their website (registration may be required but it’s painless). BCG is one of the top consulting firms and they have received accolades for their work in this area, despite skepticism from some quarters who just demand “bring back US jobs” :-)
The bottom line is BCG echoes the point I made - it’s all about comparative advantage, which includes much more than just the cost of labor. Read the reports. It’s the best stuff out there that addresses the question you ask.
Thanks for the link. I have bookmarked it for reading.