Similar to the first iteration of Joy-Cons, hitting a dedicated button will detach the controller. It's not entirely clear ...

Now that one rumored Nintendo Switch 2 Joy-Con feature seems to be confirmed, the console just needs a specific companion peripheral to go with it.

Perhaps this is just so you have a further option for where to plug in your Switch 2 - maybe it docks both ways up, to save a bit of fiddling around there? Or, is this an attachment for something ...

Nintendo's teaser this morning confirms some major upgrades for the Switch 2 that you might have missed the first time around.