The main reason for putting touch screens on laptops is that Windows 8 - 10 have an interface that is designed to be tablet friendly, at the expense of being desktop friendly. So it is easier to do an occasional touch gesture to do certain things. Also, things like kinetic scrolling is easier with touch. With a mouse, you have to click the button, move the mouse, then unclick while the mouse is sill moving. Much easier to just flick the screen with your finger.