CES Will Be Awash With Voice-Activated Gadgets. Will They Sell?

As he browsed digital store shelves last month in search of an aromatherapy diffuser, entrepreneur David Berger had a single requirement for his wife’s Christmas gift: It had to work with Amazon.com Inc.’s Alexa software.

“She’s really into making the house smell beautiful, and I’m really into Alexa,” says Berger who lives in Weston, Connecticut. “So this is a great gift for both of us.”