And the official name is… Windows 7. You might be wondering how this is news, but really Windows 7 has been the codename up until Monday when Mike Nash announced that it would be the official name as well.
The idea is that Windows 7 will continue on from where Vista left off, but to go back to version numbers instead of years and other off the wall randomness to highlight aspiration.
Mike gives the rundown on why the name was decided on his blog, here:
http://windowsvistablog.com/blogs/windowsvista/archive/2008/10/13/introducing-windows-7.aspx