This confirms what many fans suspected upon seeing the Joy-Con controllers sliding around a surface on their sides during the announcement trailer last month. Presumably, the “mouse operation” feature will allow some games on Switch 2 to be played with either traditional controller inputs or mouse inputs.

One of the genuinely new features confirmed in the Switch 2 reveal was the Joy-Cons' ability to be used like a mouse, and in a newly public patent, Nintendo calls it exactly that. In the Drawings tab of the patent's webpage,

The patent paperwork for the Nintendo Switch 2 and its JoyCons may have just confirmed the theory of the console having a computer mouse-like control option.