My kids and I were watching Zoolander the other day, and one joke I don't think they fully "got" was the ongoing gag where many of the characters had really tiny cell phones. The movie, made in 2001, was mocking a trend at the time where people were paying premium prices to get the smallest phone possible.
It is amazing how things change. If you made that movie today, it would likely be written mocking the opposite effect, with people trying to talk on smart phones the size of salad plates. Here for example is a new 6.3 inch diagonal phone. Only NBA players who can palm a basketball need apply.
Not to say there is anything illogical about this. We now read our phone much more than we listen to it. I am not sure either of my kids has ever made a phone call on their cell phones except to my wife and me.