Work at a dishwasher factory. We used to make a model with windows, they were really expensive parts, which meant that they were really expensive dishwashers for a feature that really isn't useful.
It makes sense in a microwave or oven because you can check in and make sure it's all good, or pull it out if it's done. You can't do that with a dishwasher, it just runs it's course.
Plus all you could see in the thing was splashing soap water.
I mean, when that xkcd was made, that was a hard task. Now identifying a bird in a picture can be done in realtime on a raspberry pi in a weekend project.
The problem in the op isn't really a limitation of AI, it's coming up with an inventory management system that can detect low inventory without being obtrusive in a users life. The rest is just scraping local stores prices and compiling a list with some annealing algo that gets the best price to stops ratio.