Why?
-for whatever reason, I get the impression that the movies will all be available individually as well as in a huge 200 dollar set. The '04 set was one of the few times that the original movies have not been released individually, and what ended up happening after all? They released them individually, throwing in the '93 telecine so that even people who already had the '04 got them anyway. Then there's Lucas' "it'll all be released in the end ..... now we'll see how many people want the original versions" comment. And it sold undeniably well, didn't it?
-Those multi-disc sets you mentioned, while they are just single movies and not a huge franchise like Star Wars, have made the treatment Star Wars has received thusfar look pretty bad.
-.....
-actually, at this point I'm kinda rambling so I'll just stop