m0rph3us1987 will speak at the 35th Chaos Communication Congress (35C3) (Live Stream - Relive) to publicly disclose how to exploit PS4 video applications to run unsigned code on ALL Firmware versions while the PlayStation 4 scene awaits further word on the rumored PS4 Top Secret Method for Games that requires PSN according to @zecoxao on Twitter.
In the meantime, following the multi-platform RetroArch 1.7.5 release, PlayStation Classic Boot Menu + RetroArch Christmas 2018 Public BETA and Orbital PS4 Emulator progress recent Github commits indicate preliminary development is also underway by frangarcj (Twitter) for RetroArch PS4 (Orbis) support!
For those unaware, here's a bit more on RetroArch (Twitter) from the official site at RetroArch.com to quote: "RetroArch is a frontend for emulators, game engines and media players.
It enables you to run classic games on a wide range of computers and consoles through its slick graphical interface. Settings are also unified so configuration is done once and for all.
RetroArch has advanced features like shaders, netplay, rewinding, next-frame response times, and more!"
RetroArch UWP port running on Xbox One
RetroArch PS2 WIP - Running QuickNES (Recorded with OSSC / Xbone passthrough)