If you buy a Sonos speaker on either Apple's site or in a store, you'll also get a gift card that gives you three free months of Apple Music, which naturally will work with your new speakers. That'll work whether you're a new subscriber or already paying for the service. Apple will also have demo stations set up showing off how Sonos works in more than 140 of its stores. Given that Sonos isn't the easiest thing to explain right off the bat, being able to show potential customers just how it works could be a nice boon to the speaker company.
With its grander vision of becoming the sound platform of choice for the connected home (the first step of which is Amazon Echo integration), giving buyers more places to both demo its products and buy them should be helpful. The company's gone through a bit of turmoil this year, but it seems its not ready to fade out just yet.