Ever since Windows 8 was even announced, we knew that were were at least going to have two versions--one for x86, and one for ARM.
Now Microsoft's ready to put a naming scheme on its much-anticipated menu for the operating system. According to a post on the Windows blog, ARM devices will get Windows RT, while x86 / 64 devices will run Windows 8 and Windows 8 Pro (also for x86 devices) will offer the more professional set added features for "encryption, virtualization, PC management and domain connectivity."
Windows Media Center will be packaged as an add-on for the people who want to go Pro.
For the full breakdown, click here or the source link below.
Source: Windows Team Blog