Not the person you asked but I can answer that from my perspective:

I am always on the lookout to automatate as much boring, everyday tasks. A Smart Fridge like that would allow you to generate shopping lists and reduce food waste by alerting you to possible soon-to-be-spoiled food.

A bit like what roombas are doing for cleaning. You still need to do it yourself a bit, but they help.

Not necessary, not even a gamechanger but another neat home automation. Would be nice, sad to hear they don't work well.