Then who will be inside?

One of the major websites had a lengthy article this week about the fact that the current crop of big men are "inside-out" players (which, I gathered, means they shoot a lot of 3-pointers). The article seemed to think this was a good thing. All of which raises the question, however: If perimeter players are playing on the perimeter, and inside players are playing on the perimeter, who is playing inside?