Whilst no current version of Trainz Simulator directly supports Ray Tracing, Windwalkr and Tony_Hilliam have in the past suggested that future versions possibly might...
Even so, the underlying improvements nVidia brought to the Turing architecture mean that - even without the Ray Tracing Cores and DLSS/ Tensor Cores - these GPUs show superior performance per clock and per watt than their Pascal-based predecessors.
Whilst there are so few games out there that support Ray Tracing and DLSS right now, (and none that I'm at all interested in) I am seriously considering upgrading to an RTX 20 series card like the RTX-2070 or RTX-2080 for their demonstrably superior gaming performance over any 10-series cards apart from the venerable GTX-Titan X and some (heavily over-clocked) 1080Tis.
(Will keep my 1080Ti, but replace the Asus GTX 1070 which has provided sterling performance since its original purchase).
Despite its superb performance, I reckon the RTX-2080Ti is ludicrously over-priced, so probably won't go there unless I win lotto.
Intel have indicated that their new discrete GPUs will support Ray Tracing (which is made possible via Microsoft's DirectX platform in any event).
And AMD are making noises about the RTX capabilities of some of their proposed NAVI 7nm GPUs to boot.
Best to wait a while to see what shakes out...