Photorealism isn't my priority with 3D.  I have a camera for that.  :-)

But that doesn't mean I don't want improvements.  It's nice to have the option.

I consider myself a fairly average Poser user.  I do usually do my own poses.  I can't imagine not using the Material Room.  I also use dynamic clothing and dynamic hair, though not every time I do a render; I appreciate the convenience of prop hair and conforming clothes.  I have been in the setup room, but honestly, I have no clue how to use it.