You're neglecting pointer acceleration, which applies for touchpads too. If yours is anything like mine, try this: position your mouse to the far left of the s

You're neglecting pointer acceleration, which applies for touchpads too. If yours is anything like mine, try this: position your mouse to the far left of the screen; quickly swipe across the touch pad from left to right. Your pointer should reach the far right hand side of the screen. Now swipe ever so slowly from right to left, your pointer might get about a quarter of the way across the screen. Once you consider acceleration (eg, the further you try to move, the faster you are moving when you get there), Fitt's law is more, not less, important on a big screen.