I think it is inevitable. I was watching the CEO of a large US company (actually forget which one) on the TV in a cab while going to a business meeting yesterday, and he was explaining that he thought US companies had "no more than six years" to get out of China, Indonesia, and Malaysia and back to the US with robotic factories, if they expect to remain competitive. Coming so soon after the excellent 60 Minutes piece (no offense to them, but I have to add, for a change . . .) about robotic factories, the need for skilled workers, and modern manufacturing returning to the US last weekend, I think that indeed, many toy trains and probably those I buy will be made within the US within ten years, for sure.
It makes no rational sense, but while i had planned to keep the trains I do have in spite of future offerings (i.e., I have a JLC Big Boy - so no need to buy the admittedly slightly better Vision Big Boy that I have no doubt will, eventually, emerge from Lionel). However, I would buy and replace all my locos just to get "made in America" versions, if and when that happens.
I had said in another thread that I was very optimistic, even bullish, on America's future. This is one more reason.