I wouldn't even mind if stuff like concert shows were simply digital downloads via their own site or iTunes.
It's TOTALLY doable. Why not make money off of this stuff? They can make a profit off of stuff like this without a huge cost of producing it.
I don't really forsee them releasing demo's left n right, aside from special releases (ala Bad 25, posthumous albums like Michael,etc), but I think for sure stuff like instrumentals, acapellas, live shows, interviews, etc would be awesome!
HOWEVER, as far as concerts go, how many artists release multiple videos of a single tour(s)?
Some might find it unnecessary (i mean, I DON'T), but it's about about quality control.
It would be awesome if they had like 10 Bad Tour shows up for sale for digital download...