Everyone thought that when the iPhone 5S had rumors about a finger print sensor everyone thought it would take 3 seconds to scan your print but in reality it took less than half a second and everyone was surprised. I believe that Face ID will be magical and revolutionary. I think it will work better and faster than touch id I wouldn't really miss the finger print scanner. NOW Iris ID sounds very unrealistic for now. I believe what's coming is the Face ID with night vision sensor to scan your face when it's dark and 3D lens to scan everything accurately during the day time. I am excited for the iPhone 8 I believe the iPhone 8 WILL be bigger than the update from iPhone 3GS to iPhone 4 It will be the biggest upgrade in 7 years and great enough to be called revolutionary. Even the design will be a upgraded throwback to the iP4 No way the iPhone 8 will cost less than $900 at the smallest storage.