I honestly think that given the minimum requirements of the PCSX2 emulator that it's not impossible for the PS4 to run PS2 games through an emulator. I'm aware that emulation takes many times more processing power than the original console required, but here I wouldn't have though this was a problem based on those min specs.
I'm not sure what the issues with PS2-FPK are, but I'm sure it's probably something to do with how the games are being interpreted My guess is that it's a lot like turning a PS1 game into an Eboot like back in the PSP days.
The minimum specs of PCSX2 are these:
Operating System | CPU | GPU | RAM |
---|
- Windows 7 or newer (32 or 64 bit)
- Ubuntu 18.04/Debian or newer, Arch Linux, or other distro (32 or 64 bit) | - Supports SSE2
- PassMark Single Thread Performance rating near or greater than 1600
- Two physical cores, with hyperthreading | - Direct3D10 support
- OpenGL 3.x support
- PassMark G3D Mark rating around 3000 (GeForce GTX 750)
- 2 GB Video Memory | 4 GB |
I've read that the PS4 has the equivalent of arouuuund an I5-4670 in terms of processing power which would be more than enough.
It also has the equivalent of an RX470/RX480 graphics card, which is similar performance to a GTX1060.
As for RAM, I've just found out the PS4 doesn't have dedicated VRAM? So, I'm not sure how that problem would be worked around, but it has 8GB of RAM which the system uses for graphics, so if it could be tapped into for that then you're all good.
So I don't think there'd be an issue with emulation specs, but I'm not clued up enough to actually say that for sure. It's just a case of having someone with the knowhow to create/ port one if it is possible. Again I'm not clued up on how porting works, or how emulation works for that matter. But if we can have all sorts of emulators on switch I'm sure PS4 isn't out of the question...
I take it there's no PS2 emulator in Retroarch?