Windows Vista in 8 Varieties - Try them all!

Here's an interesting story that I am putting in my Paradox of Choice file: Engadget is claiming that Windows Vista will have 8 choices.
In Paradox of Choice, one of the stories about people was when faced with a number of choices, people tened to choose the choice of not choosing.
Engadget breaks down the options as follows:

"Windows Starter 2007 - Vista without Aero, probably meant for developing nations.
Windows Vista Home Basic - Basic Windows Vista for your single PC fam, doesn't sound like much going on here. Analagous to XP Home.
Windows Vista Home Basic N - European version of the same, but without Media Player (because of antitrust rulings against MS in the EU).
Windows Vista Home Premium - This is the one we're all probably gonna own. It's got Media Center functionality, Cable Card support, the whole home-media shebang.
Windows Vista Business - Think of it as XP Pro, but Vista.
Windows Vista Business N - Think of it as XP Pro, but Vista, but Euro.
Windows Vista Enterprise - Business version of Vista with numerous enterprise features, like Virtual PC, volume encryption, etc.
Windows Vista Ultimate - Love that name. This one does all of the above (and more); what else do you need to know? It's ultimate Windows.."

Do we really need 8 versions? It used to be that there was Windows (for normal folk) and Windows NT (for businesses) and NT came in two flavors: Workstation and Server. Wasn't the whole point of Windows XP to combine NT and Windows together so there was a unified platform? Of course with Vista, we have even further segmentation (that I don't really understand) although I suppose those of us in the U.S.can throw out Starter, and the N varieties since they are region specific. What I don't understand is why bother with a Vista Home Basic and a Vista Home Premium or a Vista Business? The Ultimate seems like overkill.