Not going to happen, market segmentation works for Microsoft (unfortunately). Most people seem fine with Home Premium and wouldn't pay more for features in Ultimate they'd never use, and yet there are people happy with paying through the nose for more features.
I think Apple doesn't do it because they feel all their consumers are the same, plus the fact they control the hardware means they'd never be a need for "OS X Home Basic" or anything.
Segmenting Windows is fine, so long as it isn't oversegmented, that is all.
A single edition for Homes, fine. A single edition for Business/Professional use, and maybe a single edition that combines both (but I'd rather see the "Pro" versions being strict supersets, like how MCE2005 is a superset of Professional). As for the Embedded crowd they can do what they want as it doesn't impact consumers.
That way you don't need Starter / Home Basic / Premium, or Business / Enterprise.
I've got a long-term wager to make:
"In 10 years' time Windows will come in the following editions:
Embedded
Core // to appease the former PC-DOS OEM crowd
Starter // exploiting 3rd world nations hurrr
Netbook // just like Windows XP TabletPC Edition
Home Basic
Home Premium
(Small )Business
Enterprise
Advanced Enterprise // Enterprise but with more stuff big-corporations think they'll need
Ultimate
Ultimate Premium // has the features of Advanced Enterprise"
Oh, and don't forget the "N" (no WMP) and "K" (no Messenger) variants for Europe and Korea respectivly.