The DVDs coming in 2004 are not exactly the same as they were in 1997. A few small modifications have been made. Of course Lucas is far to busy with Episode 3 to do as many changes as he would like. The result in 2007 for the 30th aniversery of the saga there will be Ultimate Editions. These versions will include added effects and scenes to give all six films connection. New scenes for the original trilogy have already been shot during the production of the prequels. We can only guess what he has planed at this point but Ultimate Editions are definutly coming.