ESB never looked like it did on the 2004 dvds. If theres anything the 2004 disks aren't useful for, its colour--massive oversaturation and video noise issues, crushed black, and more importantly, a completely new DI with all new colour timing. The films looks slicker and in many ways "better" with the re-timing but they are extremely different than their original releases. ESB's re-colouring is probably the most insidious because it more or less looks the way we remember it but when you compare them they don't look anything alike--the film overall has a blue cast to it now, sort of a "Matrix"-like look; its effective, but its not the way the film originally was. The blue was definitly there for many sequences, having an overall cool colour palette, but the 2004 dvds really exagerate it as a stylistic look. As for Hoth on the GOUT, it is indeed somewhat neutral looking, but it was never really all that blue to begin with in terms of colour timing, at least not at all like it is on the 2004 where it is screaming blue, the way The Matrix or Terminator 2 look.