I thought hipsters all owned iPhone and Macbooks, and shopped at The Gap. I.e. they are all about conformity, fads and Buzzfeed.
No, those things are actually anti-hip. As soon as something gets big enough for Buzzfeed it's for a different audience.
"Hip" implies arcane knowledge possessed by a select few. A great band with a small local following is "hip"; when they make it big they're no longer "hip", although they may still be "cool". The iPhone is pretty much the antithesis of hip, no matter how cool it may be. If I were to guess what hipster phone model might look like, it might be something low-cost Indian android phone manufactured for the local market and not intended for export -- very rare and hard to get outside of India. Or even better, hard to get outside of Gujarat. Or even better only a few hundred were ever manufactured then the company went bankrupt and the stock was sold on the street in Ahmedabad. Provided that the phone is cool. Cool plus obscure is the formula for "hip".
It follows there is no such thing as "hip" retail chain. It's a contradiction in terms. A chain may position itself in its marketing as "hip", but it's really after what the tech adoption cycle refers to as "Early Majority" adopters.
Hipsters reject being the leading edge of anything; as soon as something becomes big, it is no longer hip. This means they're not economically valuable on a large scale, which some people see as self-centered and anti-social. Compare this to cosplayers; the media always adopts a kind of well-the-circus-is-in-town attitude when there's a con, but while they're condescending toward cosplayers the media can't afford to be hostile because those people are the important early adopters for economically valuable media franchises.
Let me give you a more authentic hipster trend than the one you named. Last year there was a fad for hipster men to buy black fedora hats from Brooklyn shops that cater to Hasidic men. While as soon as something gets big enough to draw media attention it's dead to hipsters, this fad illustrates the elements of hipster aesthetic: (1) resurrecting obscure and obsolete fashions; (2) exoticism or syncretism; and (3) authenticity.
Now from an objective standpoint there's no good reason to favor or disfavor fedoras as opposed to, say baseball caps. It's just a different fashion. Likewise there's no practical reason to value a hat from a owner-operated store in Brooklyn over an identical one purchased from Amazon. But it does add rarity value, and that's the key. Something has to be rare and unusual to be hip. As soon as hipness is productized it appeals to a different audience.