Sony invented the Walkman and made millions off of it. So why didn't it also invent the iPod, the Walkman's obvious successor? The question gets to the heart of Sony's eclipse as a electronics superpower. Was it because Japan had an appliance-centric rather than a PC-centric culture? Maybe, but the real answer is probably more pedestrian: Building a digital Walkman would've involved cooperation between the company's content, engineering, and design silos, and that just wasn't in the corporate culture in the early '00s. So Sony missed the boat.