IMHO this seems like building a better apple by making it taste like an orange. This could definitely be useful for storing json from javascript frameworks like backbone/angular/ember, but I don't see how this is going to improve the lives of PostgreSQL users in general. Hopefully this leads to some weird cool emergent use case that make PostgreSQL way better than other databases, but I'm not sure at this point that it will. Does anybody have more context on the long-game for this approach? I'm not sure what the goal is for adding this feature.