It certainly sorts out one thing for England's post mortem of the tournament. We wouldn't have beaten that All Blacks team.
No, but playing well we would have beaten the others to end up in the final. Its not a problem of capability - we have even beaten the all blacks before now - so much as one of consistency.
But then consistency is always the important bit. When I played golf, I could hit the ball as well as Jack Nicklaus. Trouble was he did it 95% of the time and I did it 1% of the time.