In theory, they both can. Both Sony and Microsoft consoles are now completely Intel-based and use similar-to, if not, off-the-shelf parts that can be found in actual PCs which would make the installation of Windows or x86 Linux distro possible. read more
I was wondering since the ps4 runs on X86 CPUs, is there a possibility that hackers will find a way to run the ps4 OS natively on non-Sony hardware. Same goes for the xbox (imagine dual booting xbox and ps4 on a custom pc). read more
The PS4, which is scheduled to be released in November at the delightful price of $400, appears to run an operating system called Orbis OS, which is a modified version of FreeBSD 9.0. read more