After a long wait Reality 3 for Poser is actually available to buy now, with a $20 discount until the 5th of May 2013!
DAZ Studio users already have Reality 2 available now, with Reality 3 for DAZ Studio announced but not yet dated as far as I know. I’m guessing possibly August 2013?
Carrara 8 is DAZ Studio's official 'big sister' software.
Carrara loads all DAZ and Poser characters and scenes,
and supports LuxRender for top-quality realistic rendering.