We are still 5+ years away from a game with real-time raytracing being practical IMO. The performance and image quality vs performance ratio is just terrible. By the time we can get good looking ray tracing at acceptable performance rasterization will look much better. The tech could be interesting for certain types of games like adventure games where scenes are rather static or perhaps a racing game if they can sort out the graininess without using frame blending which gives ghosting and cuts the frame-rate in half. The free reflections is the main advantage of ray tracing TBH.
I think the voxel cone tracing global illumination shown in UE4 is a much better approach. It looks amazing while also being doable on current hardware.
@TheVoxelman on twitter
