While that site is cool, it's far from convenient to have food shipped. I'm not going to order my groceries and wait 3-5 business days to be able to eat.
You can't order it with gold either, so gold is failure too, right?
Well gold has certainly failed, at least as a form of currency. Nowhere is going to accept your gold instead of money. Gold also is no longer the standard for currency; now currencies are backed by assets and the state of the economy.
Imagine sitting at the cash register with a spoon and a jet lighter trying to divide your .05 oz ingot into a .0124 oz and a .0376 oz ingot.
Not a problem with bitcoin!
People seem to often make the mistake of considering or criticizing bitcoin on one level- only as a currency, only as a payment method, only as a means of storing value. It has major advantages not just in one of these categories, but in all of them. Do you know how much money is made just in fees on international wire transfers every year? It's got to be in the billions, and bitcoin offers a 90% improvement on efficiency over traditional methods. This means that naturally businesses dealing with bitcoin will have an edge over companies dealing with traditional banks in the long run. Think the difference between dinosaurs and birds.