This is a fantastic example of creating a 3 dimensional effect in After Effects. Although working on a screen, you have the perception of depth to play with which makes things really interesting as seen here.
What is also great about this animation is that it is an advert for a Pollock exhibition at MoMA in New York, so it serves a purpose as a piece of work. The element of music is nice too. By making the animation work with the music it merges everything together to make it all work in unison to work on the whole. The music has to connect with what is going on. For example, this video simply would not go with a song by, say, Slipknot for example!
Be seeing you!