The inconvenient truth about anything smart is that it actually takes a lot of caring and feeding from very few experts (expensive) who actually understand the technology.<p>The end result is that economic laws put practical limit on what you can achieve with smart. The smart aspect of things needs to generate enough savings for the economic entity to be able to muster the experts to fix things, as they inevitably break in various ways. And it only happens if the entity is large enough.<p>Every, say, home could be made smarter, and the total savings would be probably big. But we won't do that as individuals, because for each of us, the cost of the expert is scary compared to the tiny savings that we can individually achieve with it. If we would organize (that is, create a larger economic entity), then perhaps it would be possible. But organization causes additional costs, too.