donovader said:

The single-layer version of Adywan's ESB looks great, but I made me think, "would this DVD benefit that much from a higher bitrate, which is possible on a dual-layer DVD?".

I think there would be a small but significant increase in the picture quality. (TV's Frink is right about where this should be discussed.) I seem to remember that Adywan has said that a dual-layer might happen at some point, but I would not count on it being any time soon. No one can post pictures of something that has not been released yet, and I am not sure you would notice a massive difference from screenshots anyway.