We all know and love the trilogy in 2.35:1, I think it would be great to have 16:9 versions just for fun... it would certainly be a unique set and, as you said, you did slide around the frame where neccessary to make sure you were framing what was most important.
I know it's blasphemous to some extent, but it IS nice to see that amazing image you produced fill a true 16:9 display!
And it's never been done before... please consider it!