The PS5 has a "compatibility feature" that allows it to run PS4 games. In the past, PS2 had PS1 compatibility, and with PS3, only the early models had hardware PS2 compatibility. Later, with the PS4 and the change of CPU architecture to x86, the compatibility with the past was switched to "cloud support".
PS5, like PS4, runs on an AMD processor. This would have made it easier to maintain compatibility. In fact, a lot of PS4 software runs directly on PS5. How did you go about developing the compatibility?
Ito: If I'm honest, I'm not aware that we did anything special for compatibility this time. Of course, the processor generation has changed, so we had to do some fine tuning in that regard, but PS5 was developed with compatibility in mind from the start, and the basic premise was that we would not change from x86.
Nishino: In terms of compatibility, it is important to run PS4 titles on PS5, but we have insisted that forward compatibility (supplying the same titles as PS5 to PS4) is important.
Based on our current assumptions, we expect that the transition from PS4 to PS5 will take about three years. During this time, how can we ensure that people will continue to buy games on PS4? Is it possible to play the games I purchased on PS5? That's what's important.
After a certain point, we will ask developers to develop games based on the premise of "cross-generation" between PS4 and PS5. Of course, we also need to enrich our library to make this easier.
There is one area that concerns me a bit in terms of "compatibility.
PS4 had "mini-applications" such as video distribution applications that operate in a different framework from games, and PS5 has a collection of such applications under the "Media" tab. As the service has not yet started, we are unable to show you any screenshots as we do not have permission to show them to the public, but you will be able to use several video distribution services.
Will this be the same as the "mini-app" for PS4?
but after seeing Horizon FW I'm like 
