CES 2013: Portable speakers blast into the mainstream

A year ago, speaker docks were all the rage, and Bluetooth speakers were considered overpriced, clunky devices that didn't sound nearly as good as wired alternatives. Today, docks are on the wane, and Bluetooth speakers are available for as little as $30. And while even high-end Bluetooth speakers can't compete with comparable wired models, they've gotten much better, and have added convenient features like charging ports, NFC-assisted pairing, and go-anywhere features like solar panels and ruggedized housings.