Don't understand how people can say they hardly notice the difference between a DVD and a HiDef format. Watching Planet Earth on DVD is like watching a movie about planet earth. Watching Planet Earth in high definition is almost like looking out a window. A lot of it depends on the source of the material and how it was transferred into the format. Older movies are really hit more miss in this regard. But I do agree that the difference (for most people) between Blue Ray and DVD is smaller than VHS and DVD or audio cassettes and CDs. It's more evolutionary than revolutionary.