I have met some IoT entrepreneurs, for example, who have worked on creating wireless IoT toothbrushes. I am thinking that Iota could be perfect for ordering replacements with the simple click of a button. Perhaps the toothbrush could have some charging station, and you can easily order replacement toothpaste, floss, etc. very quickly and efficiently.
How does the IOTA tokens fit into this? Why are they needed for ordering replacements? Devices can connect to internet and order stuff without any tokens.
For a general overview of some of the use-cases for IOTA in IoT
read this articleAs for ordering replacements, the payment processing fees are quite detrimental to micro-purchases. If you are to buy something that cost 1 dollar and have to pay a 50 cent payment processing fee, well that sucks.