This article is about a feature in Windows 8.1 that was not in Windows 8.
To my knowledge there are no PCs currently shipping with Windows 8.1 so you probably just have Windows 8 in which case when Windows 8.1 is released you will be able to upgrade to it for free.
Each version of Windows comes in different versions:
Windows XP (when released) had Home and Professional
Windows Vista has Starter, Home Basic, Home Premium, Business, Enterprise and Ultimate
Windows 7 has Starter, Home Basic, Home Premium, Professional, Enterprise and Ultimate
Windows 8 has Windows 8, Windows 8 Pro, Windows 8 Enterprise and Windows RT
Windows 8.1 should have the same editions.
To check the version and edition of Windows you have go to Control Panel, select "System and Security" and select "System".