Unreal is pretty damn cool, been using it for a while now.  The only showstopper with it for me is getting my head around figure animation :-D

Would be incredible to have Unreal Engine running in the Poser viewport though, it would be perfection itself, and even better if they could have the Unreal Engine node system in Poser as well.  There could be an option for Firefly or Unreal rendering, and the node system you get in the Material Room dependends upon which option you choose.  I've played a fair bit with the renderer and shaders in Unreal, it's an amazing realtime Physically Based rendering system.

The performance makes DAZ's new renderer look ancient already, it's instant, no waiting whatsoever, it's just there.