The Bixby virtual assistant was released with the Galaxy S8. They did not confirm anything yet if they have plans to bring Bixby to a wider range of smartphones. Surely it will not be huge surprise if they bring Bixby-powered smart speaker as well.
Samsung have also granted a design for their “Audio Device”. But, the designed patents don’t explain the concept beyond the graphics, as for now we can only say that it is most likely to be a standalone speaker.
If the company decides to release this device, we will hear about it pretty soon. Not every device that get their own patent have a release date, so we should only take this as a consideration.