Another nice aspect of this gesture that is easy to overlook is used in the scenario where you have two workspaces available but you are trying to eg. swipe left (to move right) when you are already on the rightmost workspace.
The contents of the screen will slide a few hundred pixels left, but since there is no workspace on the right to take their place, what slides in is just empty black space - which then immediately bounces back out and returns you to your screen.
The existence of this behavior very clearly communicates to the user that their gesture was received correctly but cannot be successful for some reason - far more eloquent than any dialog box with printed words or any sound effect.
The contents of the screen will slide a few hundred pixels left, but since there is no workspace on the right to take their place, what slides in is just empty black space - which then immediately bounces back out and returns you to your screen.
The existence of this behavior very clearly communicates to the user that their gesture was received correctly but cannot be successful for some reason - far more eloquent than any dialog box with printed words or any sound effect.