Let's get those who haven't heard of Sigur Rós up to speed. Wikipedia has a great write-up on them so start there. The first sentence of the page wraps things up really nice: Sigur Rós is an Icelandic post-rock band with melodic, classical, experimental, and minimalist elements. The band is known for its ethereal sound and lead singer Jónsi's falsetto voice.
Heima is a documentary film of their 2006 tour of Iceland where they played a bunch of free and often unannounced gigs around the country.
What makes this film so, so different than every other concert film out there is that is very beautiful. Their music naturally sounds like a film score so it only makes sense to film the scenery of Iceland and use their own music as the backdrop.
As far as concerts, they play in a pile of unique locations including an abandoned fish cannery, a small coffee house, a school gym and outside in the country behind an old cottage. All the locations are very laid back with audience members coming from all walks of life and all ages. There are plenty of grandparents watching with tears rolling down their faces to 4-5 year old kids looking around just watching everything.
24 hours later, I am still very emotional about seeing it. It hasn't happened to me in a very long time after seeing a film. Not even the last several Tom Cruse films (which I cried for different reasons...).
You need to get the DVD, when it is released here in North America on December 4th.
Below is the trailer for those who haven't seen it. If you want to see the trailer in HD (highly suggested), here is the link.