From anandtech.com: “For 32-bit and 64-bit PCs, there will be two editions of the operating system: Windows 8, which is roughly equivalent to Windows 7 Home Premium, and Windows 8 Pro, which is analogous to Windows 7 Ultimate.” This will be a lot less confusing than the 6 different versions with 3 different sub-editions they initially offered with Windows 7.
http://www.anandtech.com/show/5755/microsoft-announces-windows-8-product-editions
