The only way you could run CEMU on there is if you set up a Windows virtual machine and using the PS4's GPU as a passthrough, which is already impossible because 1, CPU virtualization is impossible on the PS4's CPU, and 2, the PS4's GPU would have to be completely disabled for a passthrough to work, that is if virtualization passthrough was already compatible in the CPU, which again, no. That's why Linux PC's that have gaming VMs have two completely different GPU's inside. (Or Linux runs with onboard and VM uses discrete) Then again, I don't know how the process works, but it wouldn't be *too* shocking if someone got a working version of Windows running on the PS4, since the consoles this gen are literally custom PCs. Drivers would be a huge issue if that ever happened.