The 7000 refers to Windows 7. They are keeping the 6.x.y format for no real good reason, but it was not meant to indicate thet 7 was a minor update to 6.
Announcement: Microsoft Windows 7 Is Really Microsoft Windows 6.1, Just FYI. Try Typing Winver At The Command Prompt And See What You Get In Windows 7, Just FYI. Microsoft Windows 6.1.7000, Just FYI.
Announcement: Microsoft Windows 7 Is Really Microsoft Windows 6.1, Just FYI.