With iOS 11 Beta 1, two things stand out as signalling some kind of change to the function of the power button. Firstly, the ability to shut down in Settings is redundant unless this functionality were to be no longer possible using the physical button. Secondly, the combined notification centre and lockscreen signals that the new iPhone may be locked by swiping down, rather than using the button. However, this brings into question how one would view notifications and act on them, without locking the phone. Thoughts?