Option A
1. Ask your phone to buy {name of item}
2. Screen turns on, tap to confirm your purchase
Option B
1. Find the Dash device
2. Scan the item (if you haven't already discarded or recycled it, and haven't ruined the barcode in the process of opening it)
3. Confirm and pay
To me, Dash feels like a (possibly unnecessary) stopgap on Amazon's part. I understand they have the means to try things like this, but selling a device seems superfluous given the developing capability and direction of phones. As an Amazon customer, I hope Option A is their endgame.