Remember that this has happened before, in the case of Windows Vista, Longhorn code was his name, and XP was Whistler begning of something new.
Originally, the codename of this version of Windows was Vienna, but was renamed (if temporarily) to Windows 7.
The information itself is so preliminary, do not even have a confirmed name. This was the Longhorn logo.Windows 7 is the next major version of this series of operating systems, which will aim to replace the current Windows Vista. Now in Windows has changed names and logos above. Is that, for now, is known as Microsoft Windows 7.
XP, but look forward eagerly to try to make out what is to come.