The ATMs are going to go where there is a demand for them. People in the US have a wealth of spare income, they have easy access to the internet and there are plenty more options for them to spend of use their bitcoin. That's not so much the case in developing countries. ATM machines aren't set up to try and benefit communities or countries, they're set up for the owners to make money.
Of course, it all depends on the demand for crypto-bankomats.I think that first of all ATMs will appear in developing countries.It just does not make sense to put such ATMs in poor countries.In poor countries, alas, people do not even have fiat money to pay. It is logical that there will not be many users there.