I think edge to edge screen would be amazing, hope Apple does this in the future. How it should work is;
there should be a gesture, button or something (like double tapping with 3 fingers or something idk) and that would activate a virtual bezel, reducing the active screen size to create a virtual bezel that just don't do anything, that's just there for the looks so you can hold it and use it like the iPad that is now.(imagine the possibilities, different types of bezels, colors, patterns) and when you are in a position where you don't want the bezel (like watching a movie or browsing in a special position where you don't need to hold it) you can make that gesture again to make the screen active from edge to edge, gives you more screen real estate. So the iPad would have a 11-12" edge-to-edge screen and when you activate the virtual bezel it would go down to 9.7" or optionally you could select the size of the bezel. So you can watch movies or play games at 12" and if you want to hold it you can get it down to 9.7 also. Additional virtual buttons could be added to bezels also. I think the possibilities are endless.
It would be really awesome. However i can't think of any solutions for the front facing camera.