"Windows 7" = "Windows 7"

取り急ぎ引用まで。

And, as you probably know, since we began development of the next version of the Windows client operating system we have been referring to it by a codename, "Windows 7." But now is a good time to announce that we've decided to officially call the next version of Windows, "Windows 7."

http://windowsvistablog.com/blogs/windowsvista/archive/2008/10/13/introducing-windows-7.aspx:Title