Just to clarify, the link says that Nintendo's gonna change the packing on
GBA games, to DVD cases, not the GameBoy Player's packing. You couldn't fit a GameBoy Player into a DVD case.

So I guess technically this thread belongs on the GBA board, not the GCN board, but whatever.
I say "Ick" to this.
I'm already annoyed that NOA isn't using those miniature DVD cases for GameCube games that the Japanese gamers get (you may have seen one if you have the GameBoy Player). The "DVD cases" have no personality, and contain a lot of wasted internal space. Sticking a GBA cart into one? That's even worse.
And they aren't even DVD cases. Normal DVD cases don't have spaces inside them for GameCube-sized discs, or memory cards, or GameBoy carts. These are all being custom-made for Nintendo. And designed to
look like DVD cases. What for? So you can stick them in the "DVD" section of your entertainment cabinet?
Will they increase the shelf space for sales of GBA games? There are already so much of a selection of GBA games out there that if the store had extra room, and thought it would help sales, they'd give the GBA some more. All this will do is crowd other GBA games off the shelves. Until maybe the plummeting GBA game sales force the stores to expand the section. Unless you put them on their side, which can already be done, but this would make them even harder to see than the sides of the current GBA boxes.
If they give you the spaces inside the case to store about a dozen GBA carts, that'd be pretty weird too. Since each case would have the box art and instructions of the game it came with. Keeping a pile of my GBA games inside the box for Mario Advance? That's just messed up. I'll just stick with a dedicated GBA game carrying case, thanks.
Now, if they're talking about the miniature DVD cases (like for the Japanese GameCube games), I could get used to that. It's pretty similar to the GBA's current case size, just that it's plastic.