What if your fridge could do an AI thing and the groceries to refill itself would just arrive? Could be a fantastic way to control your diet by only buying foods that satiated/goal oriented you approved (as opposed to hungry you walking down aisles of product placements in the grocery store)
Why do you need a fridge to do that? An AI agent with access to your Instacart account could do it. If you only buy groceries with that it knows roughly how many calories it purchased and you should've consumed since the last order.
I'd rather my fridge observe there are no apples, than to just assume N apples have been eaten. Especially relevant once you make if a family of 4, not an individual.