My twelve cents: Art Rock is not someone grinding a belt sander against an oil drum, miking it up till it feeds back and then looping it for 48 minutes. It's catchier than Noise/Experimental, but not really any more commercial. Art Rock is thought out, but not calculated. Art Rock can have seven or eight difficult passages as opposed to your usual verse/chorus/verse/chorus/bridge structure. Art Rock songs can also only have three chords, provided that they are just the right three chords. Art Rock songs can be long or instrumental, but they are not jam bands. Art Rock is not just an ordinary rock band with some eccentric personality or odd instrumentation piled on top to try and make it stand out. Art rock sounds weirder with a guitar bass and drum than some bands do with cellos and tubas (not that I'm gonna start naming names). Art Rock is fun. You can still dance to it. But Art Rock also rewards those who are willing to pay a little closer attention and invest a little time. Art Rock is not easily-accessible, nor does it try and push people away with deliberate abrasiveness. Art Rock does not work well in the background. Art Rock is all-inclusive and encourages artists and audiences to try something new. Art Rock does not concern itself with "authenticity". Art Rock embraces music that might not actually fit into the category Art Rock. String quartets and hip-hop are fair game for Art Rock connoisseurs. Art Rock agrees with the posit of the original Punk movement that the Prog Rock of the seventies had gotten too humorless, silly, and pretentious. But that doesn't mean that musical ambition is a bad thing. Art Rock is trying to do more than just rock, but it still wants to rock. Or rawk. Or something...