Stereo sound from dual speakers may be added to the Galaxy S8, addressing one of the weak points in the S7. The premium handset market has moved towards dual speakers due to them offering superior sound, so that upgrade would make sense for the next Galaxy S model.

FoneArena reports the speakers may come from Harman, which was recently acquired by Samsung. Harman's branding could be attached to the speakers, although it's not clear the branding means as much now that Harman has a new owner.

We'll probably learn more about the S8 around February 2017.