First of all, geolocation services for stationary computers like desktops and kiosks are not in high demand. People using these devices are definitely not in motion and they don't need to be guided by a navigation system.
But there are other reasons to use geolocation services that will save you a lot of zip code entering. Finding the nearest store, nearest red-box kiosk, measuring the distance between your home and the new doctors office, or figuring how long it takes to travel to some place from your current location.