Cyberpunk might get the update soon, the next update pending is in June/July as the media get hands on with Phantom Liberty and rumours were around the new neural update to ray tracing being patched din too since Nvidia are using the game as a tech showcase for path tracing so it makes sense really. Phantom Liberty will also include path tracing as it's a DLC to Cyberpunk so expect to see other stuff to show off what's possible on RTX, and Nvidia will want this to happen to create an even bigger gap against AMD no doubt.
Also reading the release notes on the new neural radiance update, it's said to be really easy to to implement so existing RT enabled games should be capable assuming they aren't AMD sponsored titles. The develoeprs have to do even less work as they're not telling the engine to calculate all says sent, 96% of rays will be
predicted in realtime by the Tensor cores whilst only the last few % of rays are fully traced - That's a significant performance uplift where you're scaling down from having to trace thousands of rays down to just a handful leaving all that extra headroom for performance as the Tensor cores are doing the AI calculations.
The only snag is that the more tensor cores a card has the bigger the boost will be, so lower end RTX cards won't see as big a boost as the higher end 40 series cards I guess which makes sense.
the thing to remember is that nvdiia are trying to make it easy for developers to implement this stuff into games, and make it easy to patch it into existing games. it's down to the devs to choose whether they want to get some kudos for existing titles with a quick patch update to support it, or not. Don't expect these to be supported anything AMD sponsored though.