Here is a list of things I'm looking forward to in iPhone 7:
1.) Significant reduction in top and bottom bezel (they can relocate the home button to the side and incorporate Touch ID onto the screen).
2.) Get rid of the camera hump (this can be done by using multiple camera sensors).
3.) Get rid of the ugly antenna lines (by bringing back the glass inserts from iPhone 5).
4.) Switch to an OLED display (I bought an LG OLED TV last year and nothing even comes close to it's picture quality).
Well, according to all the rumors so far, non of these will happen next year, so I am probably describing iPhone 8.