Now being serious, and not reading about it, my best guess would be automated invertory ledger. Looking what you take and in what quantities, what you put in etc. and holding that. Coupled with you marking what shit should not go "out of stock", fridge then can inform you if last piece is taken via on-door screen or an app.

Like, ding dong, Lizzy took last piece of "fuck my life cheese". xD

That could be the best for ADHD folks, lol