When I first saw the iPhone I remember thinking how silly it was that a device calling itself a "phone" only had the phone function as of many apps. Other phones had internet and other features, sure, but their "home" screen, so to speak, was a phone UI. You had to hit "Menu" or something else to see the other apps, which were clearly secondary to the primary phone function.

The iPhone felt more like a general portable computing device that happened to also function as a phone.

Even the Blackberry up to that point still felt more like an "email/phone device" primarily (though funny enough, I never had a Blackberry myself until after the iPhone came out).

The irony now, and I suspect many people are like this, is my "phone" is barely ever used as an actual phone. It's a computer with a data plan. I am way more likely to use some kind of internet-based voice/video chat than make or take a phone call.

My phone icon is still on my home screen, but only because it is something I want to be able to get at quickly in an emergency. I'm certain it's the least-used icon on the screen, though.