Do you know how else you can do that? by opening the door. We need to stop "innovating" features that absolutely no one needs, because clearly the result isn't a better product, just a messier, more complex one that is frequently over-engineered and under-supported.
The refrigerator camera sounds like the same kind of thing. Modestly useful feature that may well become standard-issue someday because the underlying components can be made very cheaply at scale.