"The Mac's been on a roll, both due to its highly regarded Mac
OS X Leopard operating system and to an unhappy reception for
Microsoft's Windows Vista. The result: For the first time in
memory, the Mac's market share has hit 9.1 percent, according to
IDC data, and Windows' market share has dipped below 90 percent.
(Linux distributions make up the rest.)
"But can either Mac OS X or Linux be more than a niche OS? After
all, Windows runs practically everything, from widely used
productivity apps such as spreadsheets to highly niche applications
such as chemical modeling. Mac OS X and Linux simply don't have the
app base that Windows does. Of course, the fact you can run Windows
on a Mac or Linux system, thanks to Parallels Desktop and EMC
VMware Fusion, lets you have your cake and eat it too."