They were already doing so, the macs are arleady made back in the states (or also) but this seems more like a huge advertisement.
Amazon is doing the same and now we have a bidding war with cities like illinois who will give them basically +1 billion $ annually.
It's a vicious circle: The retail sector is schrinking=> Amazon gets the blame (last month alone 30k retail jobs were lost)=> Amazon makes promise to open new hub => Promises to create jobs => People are happy => State gives them litterally money => Small retailers can't give the same prices => the retail sector is schrinking...