I don't think that would probably happen due to the hardware limitations as the feature Dolby Atmos needs a specific hardware which is present in S9 & S9+ as of now and it can't be implemented on Note 8 or S8 with any kinda software update.
i dont think it's linked with Hardware... bcoz one of the testing beta version of s8 got included with Dolby Atmos... And as per XDA developers we can flash it.. but for that the device needs to get rooted..
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