NVIDIA's CEO, Jensen Huang, referenced both Unreal and Unity Engines in relation to ray-tracing during a company conference call about its fourth-quarter earnings conducted this week. That is odd, however, as only Unreal has ray-tracing support at present. Therefore, Huang may just have leaked Unity's imminent roll-out of similar capabilities.
https://www.notebookcheck.net/NVIDIA-CEO-may-have-spoiled-Unity-Engine-s-ray-tracing-support-announcement.408316.0.html
Anyone who uses Unity has known this fact since last year. it's not a secret Unity will have RTX support, they would be stupid not to.