For those who weren't too bothered about upgrading to the RTX 2080 or 2070 from Nvidia, given the negligable regular performance boost and lack of ray tracing titles at launch, some good news, kinda: You'll be able to get a taste for the ray tracing experience on your regular GTX card.
The new DirectX Raytracing drivers are available now to download, and support raytracing on GTX cards, surprisingly. The big question though will be performance, and based on NVidia's own internal benchmarks, I wouldn't expect much.
According to NVidia, playing Battlefield V at 1440p with Ultra DXR enabled would get you around 22FPS on a GTX 1080 - 18FPS on a 1070 and a lowly 12FPS on a 1060. None of these are playable frame rates, but at least in the 1080's case, it'll be enough to get a little sample of life with raytracing.
Of course, to experience ray tracing the right way, you'll be better off with a RTX card, which can get much more playable framerates. There's no many games out there supporting it, though, with only a few demos available, and some games like Shadow of the Tomb Raider supporting it but only for things like shadows.
Battlefield V uses it for reflections, and Metro Exodus is using it for illumination and ambient occlusion. There's also a 3DMark benchmark named Port Royal that also supports the technology.
There'll be more coming, but in the mean time, it's a nice little extra for existing cards that will give players a better idea on weather they'd consider an RTX card worth the upgrade.