Well, it wouldn't be impossible. The real difference between say NT 4 Workstation and NT 4 server, came down to about 3 CD keys, and some extra files which bundled in the extra functionality...
It still leaves the consumer with, now 3 or 4 levels for home users (perhaps 4 if one includes starter). And in each of these, why get one over the other... No doubt more info will come out closer to release, to help people decide which is right for them... Do people buy the more limited version (to save money), or Ultimate (just in case)?
I could see many users walk in their local CompUSA or Best Buy, utterly confused (as many users are wrt their systems), and the sales guy trying to sell the most expensive option "cause that's how we make money". For those of us who they might ask advise from, there's still a big unknown in all of this, until all the specific differences from one version to another are itemized, so people can make comparisons, to provide the user with some semblance of an educated answer, to meet their confusion with...