There are Star Wars purists out there who have been clamoring for the original Star Wars trilogy to be released on DVD. By original, they mean the versions first seen in theaters--not the digitally touched up and "improved" versions George Lucas made available in recent years. Apparently, Lucas is giving them what they want... sort of.
Above, from The Empire Strikes Back, is just one of the many modifications to the Trilogy made by Lucas. For my part, I think I like having access to both.