IDM / Kinda 2-stepish / Ambient. It's hard to give stuff like this one specific genre though, so perhaps worth at looking into music from other genres that relate with this, to see what part of that song it is that's really capturing your imagination. Maybe it's all of what I will put below, in which case that's awesome!
If you want something perhaps more 2-stepish, look at some of Synkro's tracks, and also Burial.
Synkro:
http://www.youtube.com/watch?v=8v2bSQFHIfQ
http://www.youtube.com/watch?v=gLaNNRLRRO4
http://www.youtube.com/watch?v=yek8IAsbIwM
or my personal favourite
http://www.youtube.com/watch?v=wx72rfqnR5I
Or Burial:
http://www.youtube.com/watch?v=FKs0fL2PwWk
http://www.youtube.com/watch?v=OtEBEVC0HUc
http://www.youtube.com/watch?v=DOw62EREnCg
http://www.youtube.com/watch?v=uDblKjCIRjI
Branching out a bit here, if you enjoy those there is a shot you might like this somehow..
http://www.youtube.com/watch?v=ST508FBICBI
But all the above is getting a bit too rhythmic... what about ambient / chillout:
Helios:
http://www.youtube.com/watch?v=Yj55nG2tkKw
http://www.youtube.com/watch?v=FAch_Xt32Eg
http://www.youtube.com/watch?v=Ba_tDRLc3DQ
http://www.youtube.com/watch?v=cQ4pWnqlbiI
Another branch out here:
http://www.youtube.com/watch?v=1ky1td3_6LY
Testing the water here, would be great to see what you think of everything here lol
I always love spreading the word about this sort of music.
Now getting deeper into the ambient section. Biosphere's Substrata album is a sure hit if you like this:
I'll link the live version of those, just to show the great mood it gives off:
http://www.youtube.com/watch?v=k5VZKB1J2UM around 2:05 when the fantastic vocal recording is finished, and the song lifts up. It's breathtaking!
album version equally as absorbing:
http://www.youtube.com/watch?v=d2KkaRLiyxg
Also darker ambiences (I really love dark ambience, but this might be going at a slight tangent to the original song you've lank)
Uruk-hai, their stuff is hard to get (and find) as its stuck inbetween LOTR stuff, but its definitely good
http://www.youtube.com/watch?v=MWQqnMdhkv4
William Basinski!
http://www.youtube.com/watch?v=PUhimrxosdw
http://www.youtube.com/watch?v=zhfKK547r94
http://www.youtube.com/watch?v=0kxK4cOv8rI
To end, here is my Soundcloud with 3 of my dark ambient tracks in case you've got this far and are liking dark ambient:
http://soundcloud.com/aleksandrs
okay i've gone a bit far, got too excited. hope some of these are of any interest to you or anyone who sees this lol