There's quite a series of complimentary comments after it with people saying someone needs to get Gavin the other Bitcoin "scientists" to understand what the blockchain really is and why it's never going to be the place that stores every single little transaction and provides all of these ancillary functions other interfacing blockchains, cryptos and service providers will facilitate.
The person that wrote that post understands the difference between money and currency. That money is a sustainable store of value and currency is a temporary medium of exchange.
All these terms are of course relative, but I totally identify with the idea that we won't necessarily be paying for cups of coffee in bitcoin since bitcoin is trying to be more like gold than dollars.