GB Operator excites the collector in me, giving you a small device to plug into your PC or Steam Deck, allowing you to play real Game Boy cartridges.
Costing $49.99 (plus shipping), it gives you a device that supports cartridges for the Game Boy, Game Boy Color and the Game Boy Advance. Along with their cross-platform Operator application, with a tightly integrated version of the mGBA emulator so you get plenty of features.
Honestly, I hadn't heard of this until it started appearing in my Twitter feed. The developers of the device mentioned:
It’s official - enjoy your childhood cartridges, now on SteamDeck! Today we validated at the office that GB Operator and the Operator app are fully compatible with Steam OS and run impeccably on SteamDeck. This makes the experience fun and portable, we're happy to support it 💪🏻
It's been around for some time too, so it hasn't just suddenly appeared and a lot of people seem to quite like it.
I have one ordered and on the way so I can see what all the fuss is about. Seems like collecting Game Boy cartridges is going to turn into something I end up doing now…
The creators are also currently working on a SNES version.