Let me just tell you that Ben was further ahead a fraction of a second before that still. He was higher in the air and the ball was over (above) the goal line. Then he got shoved and pulled back to that point that you illustrate there. Even that picture is pretty darn close.
Now, that's the last time I'm going to explain that. I saw video of that play at a professional football player's home this past week. We stopped it at every point of progress. Their particular camera was right on the goal line. It was definitely a TD............... not that the truth means anything to some. Maybe on 4th down the Steelers could have run the ball past the back line.
Absolutely, and this is the best angle of the moment Ben made his furthest forward progress.
What it shows is:
1. Ben's elbow over the line
2. 3/4's of Ben's wristband over the line.
3. The ball hidden behind his arm.
It is certainly not a 'definite TD'. Is the ball withing 2" of the goal? certainly. Did the ball break the plane? no one can say for certain. The ref made the best call humanly possible under the circumstances. Was it the right call? Me and Ben thinks he came up a fraction short, but it is just too darn close. Reguardless, I don't see how it diminishes the win.