I ran across this interesting article about new innovations in Google Maps. Basically, Google is making this new feature just for Android phones right now, but people will be able to use Google Maps to get directions for inside locations like shopping malls and airports. They just introduced this news this week, so it could be adapted for the future.
I think this is interesting in that it just shows how vital features like using Google Maps to get directions are in this day and age. By making it only available on Android, it also promotes how important smart phones are as tools for things not just for entertainment and communication.
You don't usually think to get directions to inside locations, but a map of a place like a airport could be really useful if you're in an unfamiliar city.