The question is how to display things like that on a desktop OS that might be used with a mouse. With a touch gesture, you touch and then move vertically as a

The question is how to display things like that on a desktop OS that might be used with a mouse. With a touch gesture, you touch and then move vertically as a continous action. On a mouse, you click or turn a wheel, much more discrete actions. Edit: Aha, they addressed this: "With the new scrollbars, if all of the user’s pointing devices support both horizontal and vertical touch scrolling, the scrollbars are hidden during normal use. They will appear as an overlay on top of the window's content while the user is scrolling, and remain visible briefly to allow scrollbar dragging."