Yeah it's insane isn't it and it's not even completely finished yet...
You can still tell that it's a heavily optimized renderer, but if you see where it came from...
Now with first generation of GI, just imagine what's possible when GPU's get more specialized raytracing-cores, it's going to be insane.
Also the freedom to use high quality photogrammetry assets without the need to reduce their meshes and reproject textures is such an enormous leap.
I can see what N-Drju means with publishers still being well capable to screw up what they produce with this technology. Bad game design choices, bad artistic choices... Like Hollywood, not much different I guess.