SteamDB creator Pavel Dzhundik wrote that they found a line with RTX and RTX shader in the Artifact beta files. The Source 2 engine will probably receive ray tracing support, and card Artifact will be the first game with it.
It is not known if the feature will finally appear in the engine, or if this is just testing. Valve has not yet commented on the find.
Probably, if Artifact gets ray tracing, then other games on the engine may receive similar updates, for example, Half-Life: Alyx.