Earth is ambiance/drone with guitars. While I listen to a lot of electronic + drone, when I go back and listen to Earth, Sun O))) or Boris I am reminded how versatile a guitar can be, especially with the right processing/effects. When a listener grows out of the stage of just listening to commercial music, the listener can easily become drawn towards deep electronic/synthesized sounds and completely dismiss the guitar as a boring instrument of pop rock. However lacking in versatility the guitar may be to modern electronic sythesis, the guitar has a unique sound and is the last instrument from the classical music period that gets used often in modern songs. Bands like Earth exemplify one of the few facets of guitar music that is overlooked, its pure sounds, its sustain and its bold Western-Movie-Soundtrack feel. If you are looking for something more progressive listen to Boris.