If Tom's Hardware is to be believed, we will lose Windows 7 Starter/Home Basic/Home Premium/Business/Enterprise/Ultimate mess. Instead we will have Windows 8, Windows 8 Enterprise and Windows 8 Professional.
I do not know about you, but I do feel this is MUCH better. Until they start adding new releases...
[2012-03-03: Having three editions for Windows 8 was too good to be true. It seems that there are plans for 8 different versions (not including ARM). I am sure that everybody will be thankful to Microsoft for being forced to read various comparisons only to find later that some critical feature is not supported in selected edition. I can hardly wait...]
[2012-04-17: There might be some hope for Microsoft. It seems that count will stop at two (and few extras).]