I hope it comes with blood dna identification as passcode, tbh those feature ( iris scan,facial recognition,finger print)arent what im searching for on iphone, just make it works and excellent software,i´ll be ok,
It would be less convenient having to put your face right in front of the phone than just pressing the home button - so I don't see why apple should do that.
That being said, Android phones allow facial recognition - which can be easily tricked using a photo or video.