The list of games that won't be compatible with the except for ten titles.
The PS4 games that won't work on PS5 are DWVR, Afro Samurai 2 Revenge of Kuma Volume One, TT Isle of Man - Ride on the Edge 2, Just Deal With It!, Shadow Complex Remastered, Robinson: The Journey, We Sing, Hitman Go: Definitive Edition, Shadwen, and Joe's Diner. None of these titles are major releases and it's impressive that the PS5 has access to so many other great PS4 games at launch, especially as cross-gen saves will also be available. This also applies to all of the PSVR games, but they still require all of the same hardware that is needed on PS4.
The list of ten incompatible PS4 games might be shrinking soon. According to PS5's Game Boost feature to improve the quality of DMWR.
The developers also claimed that the same could be possible for the other nine games that aren't compatible with the PS5. There is a chance that they could all receive patches that will make them work with the PS5. This is something that Sony might be interested in pursuing, just so it can claim that the PS5 has 100% backward compatibility with the PS4.
The backward compatibility capabilities of the PS5 are impressive, and the fact that game performance can be improved with the hardware offers another incentive to make the jump to the new system. If the developers of DMVR can make it compatible with the PS5 by its launch day, then we might see the rest of the missing games coming to the system in the future. Even if they don't, the list of thousands of available PS4 titles has enough incredible games that they won't be missed.
The PS5 will be available on November 12, 2020, in select countries and November 19, 2020, globally.
Source: VGC