The Daring Fireball: "The difference with the digital hub (to use Apple’s parlance) is that it extends beyond the PC industry. The market for digital cameras, for example, is not a subset of the PC industry — it’s a subset of the photography industry. Likewise, the market for digital music players is simply people who like music. Just because the early adopters of digital cameras and MP3 players were indeed computer nerds doesn’t make them PC peripherals — they’re just cameras and music players."