Yes, this is happening. It's not as easy as these folks say and there are special difficulties managing remote workers, but for a bunch of reasons I am not going to enumerate here I think American-based engineers could hold their own for at least some time yet.
"At least for some time yet"
Oh. That's nice.
BTW, I would like to see your list of reasons, to be sure you're not just another professional whistling in the dark.