NFC is cool, but I think it limits your purchases to under 50 bucks or something like that. The BlockPay "S" app, and BlockPay Integrated support every major cryptocurrency (BTC, Steem, Dash, bitUSD, bitEUR, bitCNY, Doge, LTC, etc) and is not limited by transaction sizes.. buying a cart full of groceries, a new car, tank full of gas, or dinner for two for example.

Block times are 3 seconds or less and the Graphene blockchain itself has already proven over 100,000 transactions per second which is more than visa and mc combined.

I did a quick vid of it: https://steemit.com/crypto-news/@kencode/blockpay-demo-with-smartcoins-wallet

Merchants can issue Loyalty Points and eReceipts with every transaction if they like, and cash out to their fiat currency of choice.

Now that we are integrating BlockPay via OEM and in retail/grocery/restaurant/vending/petrol chains, this enables any merchant (NFC or QR codes) to accept one or more cryptocurrencies at zero cost. Our mobile apps and ERP modules are all in 44 languages too, so it has made rollouts worldwide very simple.

We also do not require the customer/user to have a special cryptocurrency wallet installed since BlockPay supports them all. Just use Mycelium, or Jaxx, or Dash Wallet or whatever wallet you like best at any BlockPay merchant.

BlockPay also runs on top of the Bitshares Dex, so you never have to worry about an exchange getting hacked or someone stealing your keys. Bitshares users get to keep their keys. For a merchant to come online with BlockPay, all they have to do is import the free module for their point of sale system.