There are rumours of an Amazon Echo 2 being released soon, It'll be a very interesting time with all of these new 'Smart Speakers' being launched.
The Apple Homepod, the new Sonos speaker with built-in voice mics and the Echo 2 will all be competing to become the speaker of choice for those customers looking for a great sounding smart speaker.
Pricing will be critical, as although there are millions of people who are prepared to pay a premium for Apple products, mainly to keep everything within the Apple ecosystem, I'd imagine Amazon will have to undercut them significantly and Sonos will probably be somewhere in the middle if they release a new Play 1 style speaker with built-in mics.
The only issue that Sonos have is that they don't have their own voice control system, but will rely on Alexa, and Alexa already has a huge userbase, helped by Amazon using their affordable Echo dots as a trojan horse and 'converting' them to Alexa users before either Apple or Sonos have their own voice controlled speakers.
Although we all know that Sonos speakers sound fantastic, and it remains to be seen ( or heard! ) how good the Homepod or Echo 2 will sound, the sound quality advantage that Sonos currently has will be eroded, possibly to the point that for the vast majority of people will be more than satisfied.
Tough times ahead for Sonos, especially if Amazon announce the Echo 2 before the Sonos voice control.