Feature Suggestion - Live Translation Patching
I thought that it would be incredibly useful if the Playback app had a built-in ROM patching tool to patch a game rom live while playing from an authentic physical cartridge.
This could allow you to insert a Japanese game for example, point the playback app to a translation patch of your choice (the choice part is important because Retroachivements only supports specific translation patches), and the playback app can patch it any time you use the operator to play that Japanese game and translate it to another language. The patching process for these games is usually very fast, so I think there could be a way to do it where it doesn't feel clunky.
I'm actually taking a trip to Japan and am hoping to pick up some GBA and SNES games there and thought it would be neat if the Operators translated the games for you in this way.
I guess much like why Epilogue chose to create these Operators, my idea came from a need. haha :)