There has been a PS4 developer's known as Znullptr who has ported several emulators to the PS4 (jailbroken) already with systems like the Sega Saturn, Dreamcast & PS1 to name a few of the ps4 homebrew ports present on the GameOS side of the console (ps4). We know already that emulation via PS4...
bettle ps4
emulation
emulation on ps4
homebrew on ps4
markus95
mednafen on ps4mednafenps4mednafenps4port
multi-system emulator
neo geo on ps4
nes on ps4
playstation 4
playstation 4 homebrew.
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ps4 homebrew mednafen
sega on ps4
snes on ps4
virtual boy on ps4
znullp'
