The Button will be somewhere at the ends of the gadget. However, while we are talking about prototypes of the device, because the commercial release, the situation could easily change.
did you know that Samsung is going to introduce in future Galaxy S8 is your personal intelligent assistant in the manner of Siri or Google Now/Google Assistant, which received the name of Viv. About it reports Wall Street Journal. The company makes it a high rate, so as to add that the Galaxy S8 will be even a separate button to start the assistant.