An article that covers a lot of the things cell phones can do, and do. Things you probably did not think it can, like let someone know where you're going to be at a given time and who was with you (close by, anyways).

http://www.nytimes.com/2012/07/15/sunday-review/thats-not-my-phone-its-my-tracker.html

Do you still want a smart phone?