@Mar17swgirl, sorry, you're off-base with your technical comments. LOTR being shot on film, scanned in almost certainly 2K (which is slightly higher res than 1080p and which is what most digital theatres project even now), then either sent out as a 2K digital file or 35mm film.... makes it better quality than Blu Ray. What you see when you watch the LotR blu rays is inferior to what you'd see if you saw a film projection of it in a theatre. 35mm doesn't have a resolution (though if it did, it would be higher than 4K), but I presume the CG was all done in 2K. Regardless, the film was rendered to be seen in theatres and thus higher quality than blu ray. As to file size.... um, they should be the same. It doesn't matter if LOTR's film was scanned at 2K for the blu rays and that The Hobbit was 4K in theatres... because the blu rays of the Hobbit are, like those of LotR and every other blu ray of a film, rendered in 1080p. The original file size has no bearing on the blu ray file size. The Hobbit probably just has all special features in HD video, rather than the SD videos the LotR blu-rays took straight from the DVD sets. That accounts for the file size difference. It's not the films.