Hopefully SM hasn't forgotten the Preview rendering aspects of Poser. It seems like a natural progression after adding the comic book preview that perhaps some of the wireframe previews get some attention. An occluded smooth shaded lined preview would be nifty. Not sure how occlusion distance would be determined in something like that or even if the tech exists for speedy user controlled options. Just thinking along the lines of something possible with C4d's sketch and toon and Carrara's wireframe pro plug in. I've always thought that Poser's various preview styles were very well executed.

Agreed 100%. As much as a love Poser's advanced OpenGL preview, it does need some improvements - most notably the preview of shadows for point lights is still unusable and some form of realtime reflection map functionality (this is absolutely possible, as I can get a pseudo realtime reflection map by using fresnel nodes in Poser Pro 2014). Also, shadows through transparency mapped objects are ugly, since the transparency map is ignored.
@Teyon, are you able to say anything about advanced OpenGL improvements yet? Even if you can't give specifics, it would be nice to know if there are improvements in this area or not.