The big features of Sonos' upcoming streaming box have leaked, and they sound pretty damn great, actually. The key elements are that it will have multiple HDMI passthrough ports and will act as an HDMI switch, that it will have a comprehensive range of streaming services in a unified interface, and that it will be able to send wireless audio to Sonos speakers in home theater configurations that don't involve a soundbar at all (or can still include one, but also wirelessly).
The downsides are that the software is being developed by an ad-tech company (and Sonos has a rocky reputation around software over the last year), and that it's predicted to cost $200-$400, which is a lot if you're looking at a living-room setup, since you then need to add all those speakers, and probably stands for the speakers, and all that jazz.
