Nvidia's GTC keynote earlier today contained news about the new (and very expensive) 40-series of RTX cards. In addition, the company also announced Portal with RTX. As you can probably assume from its name, this is an RTX-enhanced version of the classic puzzle game from Valve.
Portal with RTX includes updated visuals along with real-time ray tracing. It seems as though a bulk of the grunt work on Portal with RTX is being handled...