Surely implementing widescreen (which was an awesome move, by the way

) was much more difficult than simply choosing to use higher quality sound files? I haven't got a particularly good grasp of anything like this, I just assumed it was a case of having a bigger download size. Is there more to it than that?
I'm not doubting that there's a reason, I just don't understand how increasing the sound quality would be anything other than a moments work?