Linux boasts the widest array of filesystem support among mainstream operating systems. However, Microsoft (with Longhorn) and Apple (with Tiger) have made it clear that they consider the filesystem of the future to be a database of information to be mined, and that client PCs will be a major part of the next chapter in the “search wars.” The future of Linux may depend on whether Linux filesystems continue to innovate. My Take: Actually, it is more a factor of applications and frameworks get built around ReiserFS4’s or XFS’ advanced features (and scrap filesystems that don’t have such functionality, e.g. ext3) rather than “continue to innovate”. No matter how much innovation Mr Reiser brings to the table, if these features don’t get *used*, they are useless. What Linux needs is a filesystem that it’s so standard and highly used that frameworks can built around it and allow user-visible features like Spotlight or BFS or WinFS.