"This means we won't have MD and KFC anymore around here? or are the US business going to move to Ireland like most of them did?"
They are all here in Ireland already. I'm sitting here in one now. They all like the fact that we speak English, are well educated, don't hate Americans and work the longest hours in Europe. It even looks a bit like Vermont or Maine only with more rain.
The Pentium chip running the very computer you are reading this on and the Microsoft software you can see in front of you originated here unless you live in America.