content: Actually, this was done because of OS detection in web pages. When you load a page, there's usually a script somewhere that checks to see what OS you're running. These scripts have been hard coded over the years to look for 'Windows 9...', as in '95', '98', etc. So if MS had released 'Windows 9', they would have shot themselves in the foot for a naming convention they adopted 20 years ago. Web pages would attempt to load and display for an ancient web browser.