I saw this coming weeks ago, when DAZ released the Millennium Teeth. We now have replacement teeth, replacement eyes, replacement heads (Anton's Halloween Heads), swappable monster parts and wings, etc.

Eventually, DAZ will sell its figures piecemeal, and we'll assemble our dream characters online from a menu of body parts before clicking the Buy button.

Examples of this Frankenstein approach to figure design can be seen in bloodsong's Dragon Factory, Curious Labs' Avatar Lab, and FXRealm's CreatureCreator.