Contacts

This idea won't blow anyone away, it's rather simple...

There's alot of relevant information that can go into the contacts application, improving the usability of the phone or tablet. When the phone rings a picture displays of that person, the ability to simply type a name into the maps or email application, etc. If the device is supposed to be more than a toy, it seems silly not to utilize this. Below are some screen shots from the iOS app, I'd imagine Android has similar fields. I think there's an opportunity to get creative with this depending on the individual, and whether or not they see the information as helpful/relevant.