This is exactly correct. They only showed the field view on replay one time, but it was obvious the receiver was past Brown when Rodgers released the ball. You can see all three of them, Brown, Rodgers, and the receiver in that shot at the same time, and the ball was definitely NOT in the air when the contact occurred. Illegal contact was the correct call.
(But, with that said, the Cowboys should never put themselves in such a hole that the officials have that much influence on the outcome of the game. And, no, I don't think it is a conspiracy. Officials are human and thus they make mistakes.)
TANGENT ALERT!!!
And, since I'm talking about officials, they shouldn't have "officiating crews" during the season and "all-star" crews in the playoffs. They should have "officiating teams" that always work together off-season, preseason, regular season, and playoffs. Consistency is all you can ask from officials, not perfection. And consistent teams are more consistent in everything they do.