The commercial potential of internet-connected devices appears bound only by imagination and comfort. For security companies, there's a similar broad horizon as watches, refrigerators and other everyday items become tools for payments.
The concept of digital payments doesn't often cross paths with the concept of robots moving autonomously through our world. But in a few cases, robots have been created to handle payments and deliver goods.
Amazon's $13.7 billion acquisition of Whole Foods will make it a force to be reckoned with in the grocery vertical, but its rivals have been preparing for this day for a long time. Here are some of the biggest competitive threats to Amazon's digital take on food sales.