For the time being, it's just an alpha which has a loooong way before coming close to what Poser does at the moment. There are numerous bugs and a lot of things to improve before it's really usable. On the other hand, it's off to a good start and has several good points (global lights, interface) and a lot of potential. If I can risk a bet, I'd say that it has the potential to replace Poser4 if DAZ fixes what needs to be fixed in this current version. As to replacing Poser5, it has not yet the potential to compete with it, even in Poser5's still unfinished form. But DAZ have stated that they wished 3rd parties to write plug-ins for it, so it might expand the possibilities. But all this is just a wild guess... Time will tell. Que sera sera.