CD Projekt Red released a patch for Cyberpunk 2077 to version 2.21, which adds support for NVIDIA DLSS 4 and other changes. Thus, Cyberpunk 2077 was the first to receive DLSS 4.
It is clear that the new generation of frames will only work on RTX 50xx video cards, but other DLSS 4 technologies will be available. This includes the new Transformer scaling model, which provides a significantly better image. Its performance can be seen even on RTX 30xx cards. DLSS 4 produces fewer artifacts and better smoothing when ray reconstruction is used. Stability, lighting, and details during motion have also been improved. Here is what is mentioned in the official changelog of Cyberpunk 2077 2.21 for PC:
It does not matter when the updated NVIDIA driver releases — DLSS 4 libraries are supplied with the game. Later, the new driver will also update DLSS if necessary.
Source: VideoCardz