I think the two are mutually exclusive.
1) I think camera phones are popular, a lot of people will choose a phone with a better camera and indeed, a lot of people probably take a lot more pictures because of ease over anything. The Selfie existed long before Kim Kardashian, though the cameraphone can be credited with this annoyance.
2) Many people will use camera phones in lieu of other cameras because of convenience and sometimes performance, especially when it comes to concerts etc., though the lighter was by far cooler and more intimate than a bunch of display screens.
3) The majority of the people who use camera phones may have been a large segment of the compact camera market, but I don't see these as the people who would have invested in a DSLR.
I might use my smartphone camera a dozen to two dozen times a year, and as example, the two most recent cases were photographing license plates of cars insurance cards and vehicle damage after an accident and then using it to take a picture of a vitamin supplement bottle to enlarge the dose/direction.