Hmm.. Should we be worried about this? I'm pretty sold on the S7 and i think it's the phone i'm going to get. I know this sounds funny, but since it's waterproof, can we just wet it to get the temperature down.
about the only wetting you could do is to submerge it into mineral oil, and then leave it there forever. the S7 is not watertight as it has 2 fans on either side to move air through the unit to cool it.
to cool the s7 you need to remove the heat it produces and provide a cooler intake charge.