Human nature includes a certain change-averse instinct, I think; confronted with something new, we all have *some* vestige of that gut-level reaction that says "make it go away". For that instinct's purposes, smartphones are not supposed to be cameras because THAT IS NOT THE WAY IT WAS YESTERDAY!!1! (mutatis mutandis for film vs digital, dry plates vs wet, photography vs painting). And obviously we all have a countervailing tendency to get excited about the new shiny thing, and the way we adapt to changes involves those two instincts kind of fighting it out.
I actually think that works pretty well, in the big picture; individuals settle at different personal feelings about different kinds of change at different times, and we seem usually to end up on a reasonable middle path between chaos and stasis. All the wailing and gnashing of teeth about new tools displacing old ones (or less-new ones, as in this thread), and the frenzied rush of users to the Next Big Thing, are healthy parts of this process, IMHO. Y'all are part of the cultural immune system of human creativity!
OK, maybe I got a little carried away. But I think the general idea is sound---we adapt to new things, like pocket-sized Cray-killers[1] that can take pictures of reasonable quality, by freaking out about them in two directions at once and eventually stabilizing.
Disclaimer: I'm not one of the smartphone manufacturers digging their own graves, but I am in the business of selling them the shovels with which to do it.
-NT
[1] Back in about 1988, a friend of mine predicted "in 20 years you'll have a Cray killer in your pocket". Turns out he missed by a couple of years: The iPhone 4S, which came out in 2011, had just about the same floating-point performance as a Cray-1.