This is a perfect example of the uncanny valley for anyone not familiar with the concept. It's just beyond the threshold enough to make the viewer feel as if something's off.
The hair is the thing that gives it away most to me. Do love the detail with the beard stubs!
I showed it to my wife with no context, and she immediately asked if it was a still from a new video game.
Hair has a shine that would almost never happen unless you dumped an entire bottle of shampoo on your head for a week straight. It also just sinks right in, no pores, nothing.
Texture quality is still a bit low,especially on the forehead. Normal maps are off (or not there at all), so there's no bumps and crevices there. Skin is blurred (but that may be a compression artifact)
And of course, the blur feels extremely unnatural. Especially knowing the shitty photomatons 99% of people use to get their pictures taken for official purposes, they'll never have such a focus on the face and blur everything out.
I suspect 2018 is the year that stops being an thing