system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why can't PCs emulate PS4 and Xbox One games when generally the gaming PCs are more powerful?
gpt
Emulating a whole machine is really expensive in terms of resources. As well as doing everything the machine has to do, you have to spend time translating how doing it on the emulated machine can be performed using the physical machine. 

That said it's easier for the PS4 and Xbox One given that both of them are using x86-64 instruction sets now, like basically every PC out there does. Means that at least self-sufficient binaries could run without any porting or emulation at all.