Interesting thought experiment: if these become as common-place as "smart" TVs... you'll be left without a fridge. Are there any laws governing that some sort of refrigeration has to be available? I mean... seems like "the market doesn't provide fridges to part of the population" should count as a major market failure and should be regulated to avoid it?
wouldn't then a new company have an opportunity to fill a new niche?
Doesn't mean they'll go for it. There are many situations where no company is willing to offer service. See for example mobile internet in sparsely populated areas. So the question would then be: do we consider fresh food more important than internet? :D