To date, Amazon's devices with hands-free voice control have been decidedly static. At last, though, they can go where you do. The internet shopping giant is launching an updated Fire HD 10, and it's the company's first tablet with hands-free Alexa built-in. If you want to turn down the lights or check the weather, you don't have to tap the screen or wander within earshot of an Echo. This is far from new in the mobile world (just ask anyone familiar with "hey Siri" or "OK Google"), but it's definitely helpful if you want access to Alexa's skills when your tablet is across the room.