Thats where a touchpad comes in. A touchpadlike Apples Magic Trackpad for Mac OS Xenables you to interact with the operating system as if youre tapping and swiping a touchscreen, while also allowing you to keep your hands at keyboard level as if youre using a mouse.
Unfortunately, Windows 8 desktops seem to still be bundled with old-fashioned mice. If you want to be comfortable using a Windows 8 desktop you can get your own touchpad, though, like the Logitech Touchpad T650.
Youll thank me.