I don't think anyone is trying to partition projects into disjunct sets. It's more of a continuum. I think the idea of "app-iness" just captures the interactivi

I don't think anyone is trying to partition projects into disjunct sets. It's more of a continuum. I think the idea of "app-iness" just captures the interactivity and statefullness of an experience. Incidentally, that additional complexity is exactly what the Web technologies were initially ill-suited for and what frameworks were built to help manage.