There are plenty of people that are only interested in smartphones for communication. They do more talking, texting and emailing than anything else and use less than 1GB of data. I dealt with a whole company of people (40 salesmen/women) and our highest data user peaked at 1.5GB of data a month.
You have to remember 2 things though.
1- No matter how much anyone tells you differently, we really are in the minority. There are people out there with smartphones that have never installed an app or changed a single setting. I've met people that have the highest end Android phones that haven't changed their wallpaper or modified anything on their homescreen. In many ways these are the typical smartphone users. They have the phone and don't do anything with it. They like the features it came with and that is about it.
2- This is not meant to make anyone's bill cheaper or customers happy. This is meant to cost more and look like value. Verizon is trying to "offer" unlimited plans without cutting into their profit margin. Since texting and talking have become so much cheaper the only thing they can do is charge more for data. They have the biggest baddest network on just about every block in the country and they want you paying to use it in every way. They aren't going to get you on call and text overages anymore, but they will with data.
Matter of fact, if I were a betting woman.........oh wait, I am.......I'm willing to bet that there are about to be a whole new crop of very data intensive "features" on the way for all the loyal Verizon customers out there. New features that will help those data limits reach their breaking point. We can all look forward to Pandora, Netflix, Slacker and a bunch of other streaming services, maybe even from Verizon themselves, being pre-installed on all the phones. They are throwing wifi-hotspot into the new plans and why not, anything to get everyone reaching into their wallets for another $10, $15, $20, etc. of data every month. Maybe soon accessing wifi will become a paid feature just like wifi hotspot used to be.