The PS3 has the ability to install a Linux OS on its HDD, turning it into a home computer. This offers great flexibility to the system, which some love and others don't care for. We here at PS4Talk see this as a possible step towards one of the more popular OS's being available on the PS4, that the regular consumer will care to use. Linux is a massively popular OS, but ask the general person what is is and they just shrug their shoulders and think you're an uber geek.
Of course, this is purely pipe dreams and speculation, but thought arousing non-the-less. What are your thoughts regarding the matter of 3rd party OS's on the PS4? Perhaps even the rumoured Google OS will make a show on the PS4.