ATMs don't seem to do much for Bitcoin. Hacker Dojo had a Robocoin for about a year. People played with it, but didn't use it much. Then it broke down, and whoever put it there didn't fix it. Now it's gone.
There are three Bitcoin ATMs in Silicon Valley, according to Coindesk. Two are on the premises of Bitcoin startups. The third is at a mall, Valley Fair in San Jose. It's
not a full ATM, just a Bitcoin vending machine that sells Bitcoins, but can't buy them. $279/BTC on Mar 28, 2015. The price range for Bitcoin on that day was $248-$254, so there was a 9% fee for buying Bitcoins there.
This is not "moving into the mainstream".