Did the iPod kill the boom box?

(Credit: Steve Guttenberg/CNET) Starting in the 1970s boom boxes provided the soundtrack of urban life -- on the street, buses, subways, parks, and beaches -- boom boxes were everywhere. Now they're almost defunct, music has moved inside, between our ears. We plugged-in and tuned-out from the world around us. The transition from external to internal was slow at first, before the iPod there were other MP3 players, and before that there were portable CD and cassette players. But big and brash boom...