Most of Galileo's potential applications have something to do with navigation. However, the potential for location-based services for mobile phones shouldn't be underestimated. For example, most 3G handsets sold by 3 in the UK now have a built-n A-GPS function.
With Galileo chips inside mobile phones, location services will work even better. Plus, unlike standard GPS, Galileo is deliberately designed to work inside buildings and built-up areas.