The author could have saved a lot of speculation and writing by just opening a Windows Explorer window, hit ALT, click Help and About Windows to see that Windows 8 is in fact Windows version 6.2.
The Windows NT code started at version 3.1. They dropped the version numbers with Windows 2000, but it was NT version 5.0. Windows XP was NT 5.1, Windows Vista was NT 6.0, Windows 7 is 6.1 and Windows 8 is 6.2. If you want to get technical about it and consider Windows NT 3.1 as NT 1.0, then Windows 8 is really Windows NT version 4.2.
"The only way anyone can live in peace is if they're prepared to forgive." - The Doctor