PlayStation 4 emulators
THERE ARE NO EMULATORS THAT CAN RUN COMMERCIAL GAMES PROPERLY YET. ANY YOUTUBE VIDEOS THAT PURPORT TO OFFER SWITCH/PS4/XBOX ONE EMULATORS ARE SCAMS!
Even though the PS4 does have an x86 CPU like normal PCs, it doesn't mean it'll be easy to emulate as the x86 instruction set is huge. However, nearly all of x86 instructions are well documented (though some other specifics aren't) so the possibility is there. Another thing is that there is currently no documentation on the GPU (a modified Radeon 7970M with disabled stream processors) used in the PS4's APU. While the console has been hacked, efforts are as of now preliminary and not to the point of being able to run backups or pirated games - please don't even ask about PoC emulators until it's hacked. All that said, don't expect any functional PS4 emulators for a very long time, like 10 years.