Windows 7 editions ... too many, too few or just right?

Microsoft has finally outlined the Windows 7 editions. Are there too many editions, too few or has Microsoft struck the right balance?

The editions are as follows:

• Windows 7 Starter Edition (aimed at emerging markets and netbooks)
• Windows 7 Home Basic (aimed at emerging markets)
• Windows 7 Home Premium (primary home edition)
• Windows 7 Professional (primary business edition)
• Windows 7 Ultimate (for consumers who wants everything)
• Windows 7 Enterprise (volume license only)

Note: My blogging colleague Ed Bott has more details on the different flavors.

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My quick take is that this layout might just work because it really only leaves two editions for the home user - Premium and Professional. The rest are either niche or aimed at emerging markets.

Thoughts?