One thing is clear, the next version of Windows will be called Windows 8. That is unless it's running on ARM hardware, in which case it's Windows RT.

But, the Microsoft blog post does clarify that there will be three versions of Windows 8...or is it four? Brandon LeBlanc defines three versions: Windows 8, Windows 8 Pro, and Windows RT. But, the end of the blog post tosses in a mystery fourth version for customers on Software Assurance licensing agreements--Windows 8 Enterprise.

So, which version should you use?

Microsoft has made things . With Windows 7, customers had to wade through the features and capabilities of seven different versions to choose the Windows 7 to meet their needs. With Windows 8, Microsoft has essentially narrowed the options down to consumer and business. There's Windows 8 for consumers, and Windows 8 Pro for business use. Period.

Yes, there are also Windows RT and Windows 8 Enterprise, but those are special cases for niche scenarios. Windows RT can't actually be purchased--it will simply come pre-installed on or PCs. It can't join a Microsoft network domain, or run traditional Windows software. It seems like Windows RT is about as close to Windows 8 as Windows Phone or the Xbox 360, so it barely even counts in this decision process.