I feel bad for the person who can't keep track of what s/he needs to buy. I've heard of that refrigerator, and my first thought was that it's a matter of having technology anyway and thinking up yet another way to use it. My other thought was that this was probably designed by a person who has no experience running a household/family and realizing that it's no big deal to keep track of one's grocery needs.
I really don't want or need e.mails about what's in my refrigerator. It's not that tough to keep track (and if any special occasions are coming up there's always the easy-to-get-at, handwritten list on paper (or even typewritten list in one's own phone) if that's needed.
I can see a use for such a thing for people who are, say, running a busy restaurant/kitchen and/or working in some other high-volume situation; but for home? Or, maybe it would be useful for the person with limited mental capabilities (but even in such a case, has anyone ever stood in the middle of a busy grocery store aisle and tried to read even just one text message, for example? Better the person with limited mental capabilities learn the simple "art" of "food management" without having to get to one's e.mail. :/
Then again, if this kind of refrigerator means that the ones that are not "smart" will become substantially cheaper because they're plain, old, refrigerators.... great for anyone in need of a new refrigerator, wouldn't it be....