The Internet has overturned how people shop and reshaped the retail industry. Voice assistants are about to unleash another revolution. As people increasingly shop via the likes of Alexa and Siri, they will tend to demand generic products, starting with everyday items such as batteries and eventually including more complex purchases such as electronics. Digital assistants will use algorithms to compare product specifications, make suggestions, and do comparisons, so that customers can find “the longest-lasting battery pack” or “the cheapest bag of flour.”