
pic related
Every once in a while you'll see comments about hipsters (more often in some places than others) but for the most part the talk has died down about it. But it's certainly known that hipster culture has partially merged with nerd culture and has been pushing the image of nerd culture away from being proud of obscure knowledge and different passions and into being proud of having obscure knowledge and different passions.

pic still related
The above image of "nerds" isn't always accurate and hasn't really ever been, but it makes it's point all the same; "nerd culture" is not about image, "hipster culture" is. I'm certain there will be comments in this thread talking about "labels" and "stereotypes" based on image because that's what online culture in general and nerd culture specifically has become, images of stereotypes.

pic STILL related
This is a holdover from hipster culture moving next to nerd culture and bringing it's baggage with it. The popular image of a "nerd" is a shorthand for someone who looks and acts different either because of circumstance or because they don't see the value of acting normal. The popular image of a "hipster" is that of someone actively and deliberately looking and acting differently to stand away from popular image.

pic funny, but no longer related
OR IS IT?
It's easy to see hipsters as poseurs and indeed, that's where all the talk before of hipsters came from. "A bunch of people invading fringe hobbies because of superficial similarities between the social circles", but one word of difference earlier in this rambling post has changed the tenor of conversation over time. There's always been some discussion and argument over whether someone was sufficiently nerdy, but the conversation has moved to being what nerds as group look like, how the image of "nerd" is presented to the world.
But now the times are changing. Nerdery has gone mainstream. The former pits of obscure knowledge and strange passions are getting mined and sold to the common man. The former hipster-nerd has to trade on even more useless information to keep up their "cred". The problem is that these rabbit holes go stupid deep and twisty, there's no way to keep up with everything. Especially if you haven't had the kind of devotion to know this sort of stuff at 10 years old or so. The modern hipster-nerd has to keep up somehow.