Amazon announced their competitor to Square yesterday. In a way I amazed the the United States is so far ahead of the rest of the world that there sorts of devices are just available over the counter. The future really is here. I expect that in most other countries I wouldn't be able to charge credit cards without most complexity and more higher fees.
On the other hand, the rest of the world has already moved towards EMV credit cards. According to Wikipedia, most of the world has already shifted liability to the merchant if their point of sale terminal does not support EMV chip cards. This should be happening in the United States in October 2015.
So, it looks like the United States has one foot in the future and one in the past. If Amazon Local Register had included EMV support, I would've been impressed. As it stands they are just following the rest of the industry rather than leading the way.