What does a PS4 have to do with PES 2013 on PSP? Three things:

: A wider angle allows you to see more of the pitch, making it easier to spot open teammates and track opposition attacks. Modern Feel

To get this look, you generally need a specialized or a modified ISO/Save Data file.

Another possibility: the user is talking about using the PS4's camera (PlayStation Camera) to capture video during gameplay for PES 2013, but that seems unrelated to the game itself. The PS Camera is for motion controls, not capturing in-game footage. The user might be conflating the camera accessory with in-game features.

For many, playing this specific version is about pure nostalgia combined with modern aesthetics. It allows players to experience the "best" football simulation mechanics with the visual polish and camera perspective of a modern console, effectively creating a "Frankenstein's monster" of a game that fans argue is better than official yearly releases.