First, for anyone who doesn’t know what “Real-Time Ray Tracing” is, think how realistic looking the lighting, shadowing and reflections look in Blur’s Cutscenes for Halo 2 Anniversary - that is “Ray Traced Graphics”! Until now, for gameplay graphics, developers have had to imagine how the light will fall from any light source in a game and “paint that effect in”, so the light rays only really exist in the Dev’s imagination. But Real-Time Ray Tracing actually allows you to draw millions of lines to represent “light rays” from any light source in a game - as if they were actually shining light rays - and then they can accurately scatter off surfaces like light does, creating highly realistic light, shadow and reflection effects. The downside? It requires more powerful graphics hardware to do it, so it’s currently only available on very new high-end and rather expensive graphics chips (NVidia brand RTX chips). The upside? Some Devs have suggested the Next-Gen Consoles could have enough power to start including some Ray Traced effects in new games! We’ll have to wait and see though.
Now, given Xbox Chips are made by AMD who also make PC Graphics Cards that have yet to get Ray Tracing, it’s up to 343i’s teams for Slipspace Engine and Artwork etc., if they want to do the extra work of building in NVidia RTX Software Support as a module within the Engine for PC, then have the Artists apply the effects, and then re-optimise the game for it. Whether Chris Lee will announce any “extra support” like that for Infinite on PC at E3 2019, we can only wait and see.
Of course it’s possible they could embrace it to show “How advanced and futuristic Slipspace Engine is!”. But for the time being, by all means request it, but kind of expect “They probably won’t, as it’s still early days for this new Tech” - that way you won’t be too disappointed if they actually don’t, but then be “pleasantly surprised” if they do include it! 
Like Tsassi, I say this because as of February 2019, the Steam Hardware Survey shows low uptake of RTX nearly six months since they launched: only 1.11% collectively currently have an RTX 2070, 2080 or 2080 Ti. That may change with the coming 2060 at a much cheaper price point, as complaints about price are the top gripe about it, then lack of games that use Ray Tracing effects yet. On the upside, some games are adding updates which will slowly arrive over the next year or so, and RTX support has now been built into Unreal Engine 4 itself and being added to other Engines too, so it’ll be easier for new games developed on them to include it from scratch.
So, yes, Real-Time Ray Tracing is great if you can get it, and it probably is “the future of gaming”, but we’re still some way off affordable mass-adoption of the Tech, including on Consoles, which is when it will really take off.