One of the things that struck me in this video is that shadows still are very problematic. When the shadow is adjusted manually, flickering faces on the rock appear, and on the face, they don't move smoothly either. Quality of reflections / refraction is hard to judge in this scene. All in alll this is just another high-detail demo that emphasizes the fact that we're stuck in terms of rendering quality; engine complexity goes through the roof, but returns are diminishing. Looking forward to the era of path tracing.