Usually every upgrade of Windows makes sense. Windows 3.1 to Windows 95 to Windows 98 were logical but then Windows ME didn't make any sense as it didn't improve much upon 98. Windows XP made sense as it was a real improvement but the move from Windows XP to Vista didn't gain any real benefits to the end user and since you are only as good as your last product, MS is getting a great deal of blowback.<p>Windows Vista to "Windows 7" may make sense if Microsoft is rewriting the core to handle legacy apps differently then installing 2 gigabytes of unneeded files. If they scrap out the high level stuff that manages DRM, scrape off the extra crud they added, they will be fine again and Vista will be in the past.