> it could show you what's inside before you open the door

I've always thought it would be cool to have transparent doors so you could see inside without needing to open the doors. Obviously, most people do not have "neat" fridge interiors and would be considered ugly and not a good look. But having those cool spy room windows that go frosted or mirrored or some other opaque look with the flip of a switch could solve that. Which tech is less expensive: dimming glass or cameras and monitors?

It would necessarily let heat leak in

[delayed]