Music is great whether people like it or not. I get so sick of people who even bother to open their mouths, or type the words, "All the music out now sucks" - or some version thereof.
When it comes to music we all have our tastes and while I may love, or hate, Nine Inch Nails, the reality is that there are a ton of people that love them, and a ton of people that hate them.
So while 'high art opera', may be great for some, it is complete crap to others, and making any judgements against a movie like Jumper, while praising what you love, is insultive to those who feel that what you love is crap, and what you hate is high art perfected.
The difference between a music only BD and a concert BD is nothing. I don't get the point of this thread other than to say "Hey, these musicians couldn't afford videographers". BD has the space and capability for both the lossless audio as well as the video, so if there is no video it's not because it wouldn't typically be there, but leans towards them just not having the budget for the video.
I'm personally, not impressed (regardless of the quality of the music), when a decision is made to leave out something which could so easily be a part of the package. Love or hate the 'bonus material' in a movie, you still expect there to be some on the discs when you get the film. Likewise, when a Blu-ray disc can hold the lossless DTS-MA or TrueHD audio and HD video, leaves out the video, then it isn't 'progression', IMO.
Cool to see, but there's already a lot of music out there (like it or not) on Blu-ray and it's great to hear even more is coming along the pipe.