Thank you; someone has written an article about why smart fridges are dumb. My contention is that in these early stages most smart devices are a dopey idea simply because:
1 - the much-needed security is SO not there yet.
2 - most of the smart devices are solutions looking for problems.
3 - because we are so early in the process, a lot of these things will end up unsupported in a couple of years (and they are usually expensive)
These objections are all brought up in this article from How To Geek, specifically referring to the smart fridge.