Sonos has shown that it can listen rather well. The trick now is getting others to play along.
No small feat. Those “others” happen to be three of the largest and most valuable companies on the planet. Amazon.com, Apple Inc. and Google parent Alphabet Inc. all happen to own voice-control platforms that power their own respective lines of smart speakers. Throw in Microsoft for good measure, as the software giant also has a voice-enabled digital assistant that other companies are building into smart speakers. These four, with...