No point in "exporting" to other render engines. That can already be done, either through OBJ export or the PoserFusion plugins, which already enable Poser export to the best of the best, far as rendering apps are concerned.

And on the lower end, I suppose you could use Daz Studio to open Poser stuff and then export to Carrarra or something - whatever it is the D|S people do.

Or hell, use Blender.

But all those options have one thing in common, which is taking your Poser stuff out of Poser. For animation, yeah, might as well, since Poser's animation tools suck, but for stills it would make far more sense for Poser itself to have it's own Mental Ray or Vray. Those are essentuially plugins, but they work within their programs as part of the program. That's what Poser needs - an internal rendder engine better than Firefly, not yet another way to get Poser stuff out of Poser and into a better render engine.