I'd say it was one of the more momentous plays in NFL history. In some ways, it marked the ascendency of a new dynasty while signalling the decline of another. The Cowboys went on to play the 'Skins the following year in the NFC championship but, generally speaking, began a bit of a downward spiral, failing to maintain the level of dominance in the ensuing years that the team had achieved during the '70s. We all know what the 'Niners went on to do in the '80s.
What often gets forgotten is that we still had a chance to win it. In fact, we were driving for the winning field until Hacksaw Reynolds put his helmet in Danny White's gut, forcing a fumble and effectively ending the ball game.