I would like to see several features.

1. Light Linking

Light Linking is used in Maya. Basically light linking allows a light to only effect a certain object in the scene. For example you could set up a great 3 point light setup for a character but what the lips to be more specular. You could then assign a spot light just for the lips and it would not effect any other part of the character. Light Linking is a cheat but it is a wonderful cheat.

2. Scene Improvement

I think browsing in a scene should be a fast and smooth as high end 3d software or daz studio. The fps in it should easily be 100+ and allow complex scenes to be handled more easily.

3. Camera shortcuts

We should be able to control cameras through ctrl + mouse button or some similiar fashion. This would incluse rotation, panning, and zooming. I am surprised this has yet to be added to Poser.

4. Program shortcuts

We should have pre assigned hotkeys to instantly access other parts of the software on the fly.

5. FireFly render engine

FireFly has come far since I first saw it in Poser 6 but it should continue to get better. Also the lights + firefly should start to give much better and realistic results.