I saw a fridge that had an app so you could control it from anywhere.
My requirements for a fridge are remarkably simple, to the point the only practical use I could think of an app was alarm that I'd left the door open or something.
(If this particular app did have a door-open alarm, it wasn't on the list of features. It did say you could adjust the temperature from your office. A location I'm often worrying about the fridge.)
Our fridge is often 75-95% full, and things I can picture this maybe being useful for - sour cream, pickles, condiments - are often pushed to the back or on the door. I have a hard time imagining anything besides mostly "oh look, the milk jug/large bowl of last night's leftovers is blocking the camera's view of this entire shelf".
It also doesn't solve the "is that sour cream at least 1/3 full?" or equally important "is it expired?" problem, which is almost worse, because seeing the sour cream container leads to a false positive, which means I don't buy more despite needing it.