My take on this, This is a prove on how a mainstream GPU can run a real time ray tracing , on top of that without a dedicated Ai or Ray core. (probably using the compute unit on AMD )
If PS5 or Xbox 2 is aiming on Vega 64 level performance or slightly better, PS5 or Xbox 2 will able to run raytracing like every other affect without affecting the frame rates and without adding extra dedicated ray tracing core.
Even there was a rumor that microsoft is going to applie ray tracing on Scarlet " https://segmentnext.com/2018/09/24/xbox-scarlet-ray-tracing/ " and already have Direct X Ray tracing.
Sony computer entertainment also hiring graphic engineers who can do a raytracing " https://www.overclock3d.net/news/gpu_displays/playstation_is_looking_for_graphics_engineers_with_ray_tracing_experience/1"
and Polyphony digital (Gran Turismo developer) experimenting on raytracing
Even Metro Exodus Developer said it's possible for future console to run ray tracing on low level API and fast compute cores (which is already available on recent AMD GPU) "https://gamingbolt.com/metro-exodus-developer-says-that-ray-tracing-on-next-gen-consoles-should-be-possible-via-fast-compute-cores"Last edited by HollyGamer - on 15 March 2019