Prepare yourself for this one. Star Wars and raytracing?
They're showing this demo live on the show floor. From the description:
Peek into the future of real-time computer graphics with “Reflections,” the first demonstration of real-time raytracing in Unreal Engine 4 using Microsoft’s new DXR framework and NVIDIA RTX technology for Volta GPUs. The Reflections demo illustrates the next-gen experimental lighting and rendering techniques in Unreal Engine, developed in collaboration with NVIDIA and ILMxLAB.
Learn more and download Unreal at https://www.UnrealEngine.com