Oh, the box set will do gangbusters this September, there's no denying that. Still, I can't help but think there's a good amount of people out there who won't be buying it because it doesn't have the originals.
These are people who Lucasfilm would, y'know, stand to make a good deal of money off of if they'd release the originals.
The major selling points (so far) of the box are the SE and PT in high-def and deleted scenes. Yes, there's a legion of TF.Ners who will eat this up, but for everyone else I just can't see it being worth the money when there's plenty of other blu-rays competing for their hard-earned dollar.