Not meaning to stray from the topic, but it DOES amaze me that people think that MP3 audio is "so good". It is good. Good at being a compressed format, that is. Like satellite radio. Talk about a throwback to sounding like AM radio. There are receiver (and stereo) manufacturers that allow for compensation for compressed audio, but it is just "making it up" as it goes. A lot better than regular compressed audio, but still not the same as lossless. Which is also like regular definition DVDs on an upconverting DVD player. It is a lot better (in my opinion on my 104" HDTV projector) than non-upconverted, but still not the same as film quality or even hi-def.
They just announced the first 50 GB Blu-Ray movie is comeing out, of course the space will be for hi-def extras, and no better picture or sound, but at least it using the space, and people will start to put higher quality audio in more channels at some point.