What happened to phone booths?

Around 10 years ago when cell phones started to become increasingly popular, phone booths started disappearing. I think it is interesting that we use to love our privacy so much that when we were on the phone we felt the need to enclose ourselves inside a stuffy little box.

So, here we are today. All of us carrying cell phones and privacy is the least of our concern. Whether we are in a restaurant, walking down the hall, or sitting on the toilet of a public restroom, there seems to be no boundary for where we'll talk or text on a phone. Even though we don't use pay phones, wouldn't a phone booth still be handy to have?

So, what happen to all of the phone booths? Where did they go? Did we all just get too fat to squeeze inside of them? One day our kids will say, "What's a phone booth? Do you mean Superman's dressing room?"