Well the columnist does admit at the end that there are situations when you just want to pull out the iPhone, not a bigger camera.
I've complemented shooting with my D750 on my travels with some iPhone panos and videos, including time lapse and super slow-mo.
I don't print anything so probably can't see the difference but they look good even on my retina display MacBook Pro.
I once saw a museum exhibit of photos taken by people from the '40s to around the '80s. What it showed is that as cameras became more affordable and smaller, people took pictures of subjects they didn't used to, like inside their homes.
Before cameras were affordable, people went to studios to have portraits taken so it was mostly these posed, studio pictures. But once people got the equipment, you got more impromptu, intimate photos.
I actually went to Best Buy to look at the A6000 this past weekend. Also checked out some smaller point and shoots too, figuring they will be an improvement on my iPhone. Their sensors are not that much bigger than the one in my iPhone 6 Plus but they of course have much better optics.
However, while they're pocketable, they're still at least twice as thick as my iPhone and probably double the weight. I just don't see myself carrying it around with me everywhere like my phone, since the utility is limited to just taking pictures.
It's just another device that I could lose, get stolen or damaged.
Now, I may consider a phone that is 1-1.5 inch thick, just to get bigger sensor and better optics but it's unlikely such a device will be made.
Reality is, more people are taking pics with phones by a huge margin now. So it draws a lot of software support, with apps. which do some interesting things to get around the limitations of the phone cameras. But more importantly, decades from now, people will look at archives of Flickr and other sharing sites and smart phone photos will represent a lot of the photography being done today.