In many ways Sonos is the Apple of audio. Its speakers and software are easy to use with thoughtful design and attention to detail, it has its own well-developed wireless ecosystem that "just works" and its products are priced at a premium.
The Sonos Beam offers the promise of multiple voice assistants, with Amazon Alexa now and Google Assistant in the future; Its expansive sound can fill a small room; HDMI connectivity includes the ability to power up and control TV input switching via voice command.
The lack of a subwoofer means the Beam lacks deep bass compared to sub-equipped competitors; You lose some connectivity options on TVs that lack ARC; Google Assistant hasn't been added yet