Realtime Physically Based Global Illumination and Reflections etc.
Imagine being able to do that live in the Poser viewport :-D

And just think, this could be your Poser content you could be rendering and walking around without waiting for a render:

Oh, and the node experts around here would likely get a techno-stiffy if they saw the node system for Unreal Engine :-D
Of course we can trust SM to make it all easy and perfectly integrated though!

Anyway, here's a few cinematic quality visualisations done without the need for a render button :