I’ve always ALWAYS wanted a case that would open at the spine. This way I can grab the movie or video game disc, and just leave the case parked on the shelf with the rest of my library.
I think a static design would work, wherein the disc holder is just attached to the spine. However I went the extra distance and created a ramp and slider system, so the disc could roll towards you. It’s a bit more clearance from the case, and having this extension mechanic just exclaims “Here is your movie/video game, enjoy!”
This can co-exist with the existing jewel case system that opens like a book, should you need to get at the booklet, or prefer to get at the disc old-school style.
Not only is this handy for those who own many films/video games, but it really keeps things neat and organized.
I think this could be a system people would upgrade all their cases to in a wholesale fashion. As long as they recycle their old cases!