Game-key cards are different from regular game cards, because they don’t contain the full game data. Instead, the game-key card is your “key” to downloading the full game to your system via the internet.
Pay a premium for a physical copy of your game, and the cartridge may not contain the actual game. Only on Nintendo Switch 2.
Yeah, it definitely puts their overhaul of digital game sharing in perspective. They are ABSOLUTELY shifting to digital. I wouldn’t be surprised if the Switch 2 Lite had no cartridge slot at all.
That said, their idea here seems to be that you have a physical cart with a game license in it so you can download the game on multiple consoles and then just swap the key around. That is not a new idea, but it goes to show how frustrated by the limitations of having to ship flash memory with every game they are.