September 5th! That's the first time I've heard of the actual release date for these discs; can't wait. As a huge Kubrick follower / fan, any new presentations of his work are always greatly appreciated.
In regards to the way in which he shot and presented his work, I always feel that it's best to consider the perspective of the artist. That is to say that those decisions were made to satisfy his particular artistic vision at the time, and we see that it obviously differs dramatically from film to film. It is generally true that he preferred a presentation that allowed for height as opposed to great width. Basically, if he could have his own way with his later three films, which were theatrically presented as 1.85:1, he would have shown them without the mattes. However, the realist in him knew that he had to deal with 1.85:1, and that was that. When it came around to presenting the films on television / home video, he had the opportunity to remove the mattes and present the work in a manner that he enjoyed more personally. Aside from a few shots, such as the opening shot in The Shining that shows the shadow of the helicopter, he always kept the full frame in line with the eventual 1.85:1 compositions, meaning that things like boom mikes and such would not be revealed when he dropped the mattes. It may seem odd to us, as it changes our viewing experience relative to the original theatrical presentations, but that is simply the way he liked to see it himself; once he had the opportunity, he made it happen.
Clockwork is a bit different, in that it was shot and theatrically shown in 1.66:1. Again, that was simply his artistic decision, and he did not have a problem getting it shown theatrically in 1.66:1 at the time. Logic would lead me to believe that if he had filmed Clockwork in the 80's or later, he would have shot it full frame for a theatrical 1.85:1 presentation, just like his last three films.
In any case, it's great that we will now have the opportunity to see the films both as he would have liked to show them with the current discs and as they were originally shown theatrically (at least it will be pretty close ;-) ) with the SE discs on the way. Personally, I enjoy comparing the two differing versions just to see the subtle differences in composition; what is added, what is taken away, and so on. Anything that sparks further analysis of the work is a good thing in my opinion. I think that fundamentally, Kubrick considered the films as different animals in different mediums: a film shown on a conventional TV set is one experience, and a film shown on a full size theater screen is another experience, and he chose to present the work in a way that best satisfied him within the constraints of those mediums.
CLD