When all the dust settles there will be basically two versions of Windows 7 available.
Windows 7 Home premium & Windows 7 Professional, with a third, Ultimate available on a limited basis, for those who need enterprise features, (or "the Best"
), such as small business users who are not of a size to benefit from enterprise licensing.
The Starter, Basic, and Enterprise versions are Specialized products which you are not going to see in your local PC store.
Whereas I can see the logic behind both Home and Business under the Vista Model, ( where both versions were different subsets of the whole). Under the new model where Professional contains everything in Home Premium, I feel that one version could have been provided. This would I feel remove a certain amount of frustration for HP users such as the lack of Fax and group policy management in Vista HP
The extra complication is of course the provision of X86 & x64 which hopefully will both be provided with Home Premium, Professional & Ultimate/Enterprise
Unfortunately after saying this I do fear that we may see the starter and basic versions on lower end Laptops/Netbooks where these are built down to a price, especially in the current economic climate.