There's a term I read about a long time ago, I think it was "aesthetic completeness" or something like that. It was used in the context of video games whose art direction was fully realized in the game, i.e. increases in graphics hardware or capabilities wouldn't add anything to the game in an artistic sense. The original Homeworld games were held up as examples.

Anyway, this reminded me of that. Making these pictures in anything but the tools of the time wouldn't just change them, they'd be totally different artworks. The medium is part of the artwork itself.