Could be one of the most valuable features of the switch.
One of the major drawbacks in online multiplayer is having to go to a room to find matchmaking. That is annoying when the game is not popular as mario kart, call of or fifa. I dislike nothing more than waste my gaming time by waiting a connection in an empty room.
I want to be able to play single player mode while I wait for a room to be filled in and, once the room is full of players, switch and launch the online game.
I hope that this app will adress this by allowing to play single player mode on my switch and enter in a multiplayer hub in the app, waiting for people to come.