The smart Wi-Fi speaker market is booming right now, thanks in large part to Amazon.com's (NASDAQ: AMZN) wildly popular Echo. The e-commerce giant has now displaced Sonos to become the No. 1 vendor within the Wi-Fi speaker market, according to Strategy Analytics. In 2016, shipments of wireless speakers that utilize Wi-Fi (as opposed to alternative wireless technologies like Bluetooth) collectively jumped by 62% to 14 million units, with Amazon accounting for an incredible 77% of the increase in demand.