I'll give you an actual scenario, maybe you can relate: One of your kids is sick and yells for attention. You shuffle in the next load of bedcovers into the washing machine while trying to remember to call the doctor for an appointment. The detergent box is near-empty. If you are like me, it could take days until you get the 20s of uninterrupted time to jot down the detergent to your shopping list. Fast forward 1 week. No detergent. You are out of bed covers. The other kid is sick. Someone hands you an Amazon Dash that orders your standard detergent. You break down and cry, thanking that someone for the act of kindness. OK, the last part is exaggerated.
Now what about when the price goes up? Will you ever even notice how much the increase was? Would you have considered switching brands? Or sizes? Did you have time to go through your email receipts, or now that the kid was finally asleep, did you open a beer and sit down with your partner?
I'm guessing that the people using this, and order-everything-online are relatively price insensitive for the types of things this appears to be targeting. Saving $0.30 or even $1-2 probably isn't going to make it worth it for me to reconfigure or find a new brand.
It's also self-selecting: if you ARE searching for the absolutely lowest price, or are price sensitive, you're not the right target audience for this kind of tech or company :)
>> But why do you need a specialized button that only does that? That's the part that makes no sense.
It -does- make sense if you take it as a way to introduce not a product ("specialized button") but a platform[1] for long overdue and much needed innovation that some very influential people have started to fund and promote[2]. It is not the only way to do it, but it is amazon's way to facilitate it and in the process get some market pioneering advantages. A company like amazon doesn't have the infrastructure to start building home appliances but it required little effort for them to contribute in a way that brings them great benefits. Smart move, amazon.
The example they use is detergent because showing someone reaching for toilet paper and realizing she needs a refill isn't such an easy commercial to shoot.
So you run out of paper, press the button and, under 2 minutes, an Amazon InstaPaper delivery drone arrives (yes, they bought the service and the brand), entering your apartment thanks to wonders of a cloud-synced Lockitron, and drops the paper next to the toilet door. As it leaves, you're left wondering if maybe it's time to buy that Amazon Echo and have it react to you shouting "OH FK", saving you from having to clean the button...
What I don't understand is button-for-delivery for uncommonly ordered items.
You want to order detergent online? Great! Me too! But why do you need a specialized button that only does that? That's the part that makes no sense.