As Blackhearted said, displacement maps come with a cost.

Poser 9 and PP 2012 on a modern machine hardly notice polygon count at all anymore.

Of course it's impractical to model every last detail like skin pores and veins. That's where bump and displacements maps are good.

But low-res game meshes are just that: Meshes specifically designed to work in a game environment where you hardly notice sculpted details.

Nothing I'd like to use for Poser where it's all about static renders.