
Linux only has a small percentage of the computing market, however Microsoft already considers it a major competition as the open source OS steals the hearts of many users. Following the hard numbers though, Microsoft also increases its market share on both server and desktop space with time. The only logical explanation is that Linux steals quite a market share from the traditional UNIX providers (SCO, Sun, SGI, HP, IBM). But only Sun seems to truly be in a real Linux trouble, as it is the one with a resistance to Linux integration to its full product range.
I have never understood why Sun and Solaris is so popular. I have nothing against Solaris, but I really like HP-UX and AIX much better. It looks like HP and IBM are in a good position with Linux while Sun talk much about Linux but does not do much.