The apparent vents on the side are interesting. I'd be willing to bet they enhance the acoustics. However, they could be a safety feature (preventing lawsuits when the current generation all go deaf from banging their eardrums to the point of cochlear destruction). Also, wouldn't it be great if those vents were actually mics for active noise cancelation without needing a separate power source other than the audio out? Or perhaps all 3 possibilities combined?
I was trying to figure out what those vents could of been, but I'm hoping for any or all of those proposed ideas