Smart-home technology just keeps getting smarter. Case in point: the Amazon Echo. This freestanding device serves as your digital butler, always at the ready and patiently awaiting your voice commands. Ask for music, and the small, cylindrical tower fills the room with immersive 360-degree audio. Ask for info—be it the weather forecast or a sports score—and the Echo instantly responds with the answer to your query in a life-like voice. And the Echo only gets better with time, thanks to automatic software updates that keep your little helper at the top of its game. Available on Amazon; $180.