archival edition

I heard that in 2006 there will be an archival edition of SW on DVD, is that ep IV-VI or the whole story? What is the big change? Why buy it? Can somebody help?

I think it said in the Star Wars Magazine a while a go when asked why there wasnt a DVD that on 2006 there would be all 6 films with all trailers making ofs and cut scenes.. however given that hes now releasing EP1 he probably still will with just a little bit extra on the arvhive thats not on the EP1 but which will have something the archive doesnt so you have to but both...