Yeah, in ancient times, refrigerators were basically just "Ice Boxes": simple insulated boxes, where you kept your food that was apt to spoil at room temperature. It did not have a power cord, but instead you'd have an ice delivery company bring you a fresh block of frozen water every time the previous block had almost melted.
That job is long gone now, as is the delivery of coal or oil to normal customers mostly. Deliveries never cease though, its just the stuff that gets delivered that changes. And in modern times, delivery is also no longer restricted to physical delivery. Lots of interesting stuff now gets delivered online, like software and data.
The next revolution in delivery is still far off though: being able to deliver just raw energy, and then using information to shape it into matter!