Kutaragi revealed that he wants a hard drive so the system can run an operating system - possibly Linux - in order for the unit to be commercially reconized as a computer. This simple designation would entail lower import tariffs from other countries, and pre-installation of linux means that through the opensource OS, PS3 owners could gain access to any number of free or low-cost home computing applications ranging from word processing to HD video-editing software. In effect, PS3's use of Linux would not only make the system much more versatile and attractive, it would also be a swipe at Microsoft's Windows OS. Kutaragi even said that the PS3 could run multiple operating systems. "Of course, if Linux can run, so can Lindows [a variety of Linux emulating the usability of Windows]. Other PC operating systems can run too, such as Windows and Tiger [Apple's OS X 10.4], if the publishers want to do so. Maybe a new OS might come out just for the PS3."
Source: Game Informer Mag (issue 148)
My Notes: Wouldn't this move make the PS3 able to catch viruses, adware and so on? Also with the Linux exploit for the Xbox, this may make online play much more anoying with s and modders. I don't know if this is true or not. And remember that the PS3 will come out next year. That's a lot of time for discussion.