Lions got completely hosed. I joked about the PI penalty the fans all cried about in the playoffs last year but that was with 6 minutes left. This was the last play of the game at the goal line. It's not even subjective like a PI penalty, either. It was obvious to everyone that the defender intentionally swatted the ball out of bounds.
Every play needs to be reviewable, with reviews being instigated by a cohort of rules experts watching the game, not just the officials on the field.
How much longer until the NFL and TV broadcasters get a hold of technology which detects penalties on every play? 10-15 years, if that? Whoever develops that is rich. Once that technology exists, how could the NFL not use it? And at that point who needs the refs on the field at all?
I don't think that they are an integral part of the culture, just a necessary part. Once they aren't necessary, dump em.