In London, UK, nearly every shop that has contactless terminals has either an ApplePay sticker in the window, next to the terminal or displayed on the terminals screen.
I think you are saying if they had contactless payments already that they are quickly adopting Apple Pay, which is great.
My point is that we will eventually get contactless payment terminals in mass but only when those terminals were planned due for an upgrade. I know that Apple lists many retailers in my area as supporting Apple Pay and some of them have contactless terminals but when you go there, no luck. In my area, about an hour West of Philly, AP works at McDonalds, Staples and Coke Machines, that is about it. Travel an additional hour outside of a major city and it will be a decade until those retailers spend money to upgrade their terminals.