Multiple keyboards is trivial - unless you meant multiple active cursors. (If you've used a USB keyboard attahced to your laptop - you've already experienced multiple keyboards. Both work.)
Multiple mice is esoteric.
Multiple mice is esoteric.
And at home, I have a mouse on the left side of the keyboard and another one on the right.
Assuming that multiple mice obviously means multiple cursors while in the same comment assuming that multiple keyboards obviously does not imply multiple input cursors is in fact pretty confusing to me
So a keyboard being attached to a seat, whose input might be associated w one active window, while another kb is associated with a different seat and different active window. Perhaps I'm just overthinking it.
Interestingly enough, it seemed that the inputs from multiple mice onto the same cursor is summed up by default. So you could fight cursor movement you disagreed with by moving the mouse in the other direction.
Very silly, but quite funny.