Sadly with at least 11 versions of vista currently on the market people are going to be confused as to which to buy.
Sadly Microsoft are not being quite upfront with the pubic on vista and it's much vaunted features as all but 5 of them are not fully implemented in the Home version and are only fully implimented when you arrive at the Enterprise version which makes Vista for the Home user much less a new operating system and more a warmed over version of XP pro for which a lot of the so called new features contained in the 'Full' version of Vista have been available as add-on/tryouts for Xp for a long time now.
Vista, while being attractive to the 'Must have Brigade' is in fact for the average home user a marketing ploy by Microsoft and a lot of people in the computing community have stated that they will stay with XP at least untill Microsoft withdraw support.