It can help you differentiate between whether it register a quick tap on the touch screen vs a force press.
Not that they do it on the watch, but it could also have a ratcheting-type feel when you scroll to indicate a) that you're scrolling or b) how fast you're scrolling.
The Steam Controller actually used this to great effect.
Not that they do it on the watch, but it could also have a ratcheting-type feel when you scroll to indicate a) that you're scrolling or b) how fast you're scrolling.
The Steam Controller actually used this to great effect.