What's on center stage at the CES tech show? Your voice

Some of the most popular gadgets over the holiday season were smart speakers with digital assistants from Amazon and Google . Apple is coming out with its own speaker this year; Microsoft and Samsung have partnered on another. As the annual CES gadget show kicks off in Las Vegas this week, manufacturers are expected to unveil even more voice-controlled devices -- speakers and beyond -- as Amazon and Google make their digital assistants available on a wider array of products. If these prove popular, you'll soon be able to order around much more of your house, including kitchen appliances, washing machines and other devices. CES is expected to draw more than 170,000 people, as some 4,000 exhibitors showcase their wares over the equivalent of nearly 50 football fields, or more than 11 New York city blocks.