Assuming these mockups/rumors are accurate, I guess this is also the end of a white-faced iPhone? I personally have always had black, so no sweat off my brow, but I know quite a few people that prefer white. But I can't see white bezel/earpiece as that would stand out horribly.
That's also what I was wondering. If the screen is going to take up the entire front, then the only white would be a weird border. I assume it's the same reason why the Watch has no white front options. Considering the Watch and the MacBook colors, it does look like white might be going away.