Ray tracing is the hot new thing in video game graphics - so hot in fact that Sony's already announced the PlayStation 5 will be capable of it. So we're starting to see existing games with the tech enabled - with impressive results.
Digital Foundry has already reported on Half-Life 2, Minecraft and Crysis with ray tracing enabled. But I wanted to point to a couple of videos that show what Grand Theft Auto 5 and The Witcher 3 look like with ray tracing.
First up we have Grand Theft Auto 5 with ray tracing. You can really see the improvement in lighting in Rockstar's open world epic, particularly with the car parked under the freeway. I also love what it does to the house interior - the tables look fantastic!