JJ is popular in Belgium, so he's often playing on Belgian ground. He has a good view on the Icelandic music scene in particular.
Read an interview in Dutch/Flemish called "Met hartelijke groet van een gelukkige melancholicus" with Jóhann Jóhannsson by Karen here.
A small part translated by me:
DaMusic: Why is it that your music, and also the music by Sigur Rós & múm, is so popular by making rather isolated soundscapes?
JJ: Well, our individualism unites us: we are very different but we all do our stuff in a radical way. You can call me, Sigur Rós & múm typical Icelandic, just because we are so different. Iceland is like a playgarden for musicians & artists, inbetween the cultural & political influences of the USA & Europe. In one way we're isolated & individualistic, in another way we're a melting pot. A bit like Reykjavik itself: on the first sight a small town, but at the same time cosmopolitan & anonymous city.
Jóhann Jóhannsson's Official Website