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It's definitely not. I hope that PIVX or another cryptocurrency will be used in physical stores one day. Not only used but mainstreem. Right now it's mostly just for geeks. Very patient geeks. Before it becomes mainstreem I think it has to be as fast as using a bank account and as easy to use as a credit card. Maybe the first part could be achieved with a thin client. Maybe a real credit card could even be connected to a PIVX account. I hope so.
you can already use ~55 altcoins on shops with coinpayments plugin/gataway:
https://www.coinpayments.net/ there are also efforts in work so you can buy PIVX with CC
check the off. forum for more infos:
most of the interesting stuff happens on slack and/or off forum
cheers