I like the idea and wish it would happen, but too many people (meddling kids!) are into downloads and don't care as much as us about sound quality. There won't be the critical mass to make this a common offering. Enough people own Blu-ray players and are willing to sit through a movie, but not nearly as many own audiophile equipment and are willing to sit and just listen to an album primarily for the sound quality of the music.
I can see occasional special releases, like the Rush: Moving Pictures Blu-Ray and the Pink Floyd immersion box sets, continuing.
