That's not what this article is about. You still only have one mouse cursor in that case, but two things (the touchscreen and touchpad) drive it.
This is about actually having multiple, independent mouse cursors on the screen at once, with different input devices controlling different cursors.
Sometimes that's true, but sometimes (imo the superior approach) the touchscreen is independent from the cursor. I think touchscreen Chromebooks are like that, for example.