Originally Posted by effmaster
The same reason you would have an uncompressed song, it sounds better, but not by much while it will sound better as it takes up more storage space the diference is less and less noticeable the less compressed it is. so movies don't necessarily need to be uncompressed to look NEARLY as good as their uncomopressed movie theater quality brethren
But they don't have to encode it if it's uncompressed
Plus, it will remove the graininess (it's actually a word haha) from movies that they would encode poorly. I've seen lots of compression artifacts in some of these HD movies b/c they're lazy and don't want to do it right (and it's not the graininess from the film type either).