I think Poser 8 needs a whole new render engine and new lights. At least that would be at the top of my list and unless I read that it can do proper raytracing and have lights that are competitive with other program's lights, I won't even bother with it.

I personally don't care about the interface one little bit. There is alot I would do differently with the interface if it were up to me, but I'm used to it by now and so is everyone else. There are far more important things they need to spend their time on. Although I'm not confident they're not going to waste a bunch of time on that. (After all, it was in that wicked survey they posted here. I believe there will be interface elements implemented to assist with finding one's Content Paradise crap, which, IMO, will be a serious waste of time. I hope I'm wrong about that.)

I would like to see the camera trackball and other tools be replaced with more industry standard navigation ability, such as Alt+LMB, Alt+MMB, and Alt+ RMB for rotating, panning and zooming, plus have the ablity to dolly in with the scroll wheel on its own.

I also think Poser 8 needs to have a separate 64 bit version that is also fully multi-threaded, to beter deal with the more common use of higher res textures and geometries. How many of you are aware that when you're rotating your camera around, zooming in and all that, most of the OpenGL is being handled by your processor? Yeah, that shiny new $400.00 GTX 285 isn't doing much in Poser.
So IF all four cores of a quad core were being used and IF the GPU was also being used, Poser would be quite a bit faster. And the GPU could also be used to assist in the actual render.

However, I think Poser would need a whole new, modern code base to include my suggestions, so I'm not real confident.