Does Tim Hecker count as hipster ambient? Got into his music for a while early on, but got out of it. Last time I had a listen at his stuff recently, it looks fatally hipstered out to me. I feel like I could be entirely off base on this one, but am too lazy to dig deeper.
Cant say I know what hipster ambient is but I can say that Tim Hecker's Imaginary Country gets played a lot here.......grunge, distortion & glitch washed over beautiful melodic imagery!
For plenty of unlistenable "uber cool," check out 12k label. They've released some good stuff, of course, but most of it to me seems more concerned with how it was recorded ("field recordings by a crackling fire with my synth hooked up to a generator so I could be inspired by my natural surroundings!" etc.) rather than how it sounds.
I think 12k is a "Sound Art" label that occasional puts out music that may fit into a perspective of ambient, at least the ambient music that gets discussed here. Avant Garde, experimental type music is often concerned about the production environment and is as important as some here are about the synths/sound source used to produce their music. Recording guitar in a WW2 ammunition depot could be considered really ambient....the field recording is part of the music. This is the spirit of 12k for me.