Seven Client OSes That Could Replace Windows - Linux
In contrast to OS X, Linux-based operating systems run on just about every processor architecture and hardware platform under the sun. What's more, Linux benefits from an active and growing developer community that has managed to assemble a variety of compelling desktop options. With that said, Linux trails Windows and OS X in desktop application support, as well as in hardware certifications and preload deals. The wide variety of desktop Linux incarnations makes it difficult for ISVs and IHVs (independent hardware vendors) to close these application support gaps.