Now that they are finally together as king and queen, do te see this scene as the most significant foreshadowing of what was to come? Why o Why Not?

I think there are many scenes in season 1 which foreshadowed the relationship between Arthur and Gwen and this is definetly one of them. Another one is the scene where Gwen told Merlin "who would want to marry Arthur?" and the exchanges that they had in Ealdor when she stood up to him. In my opinion, Arthur had already seized to think of Morgana in a romantic sense in the Lancelot episode, 1x05, when he asked Lancelot if he found her attractive. I think his attraction to Morgana was wanning and he was wondering why which is why he asked Lancelot because no man who is truely attracted to someone cares about what another man thinks of the person. I think he began to mostra an interest in Gwen in 1x08. No, it wasn't Amore but it was definetly a sort of intrigue which is what led him to come to her aid when her father died and to flirt with her in the above scene. People who complain about A/G being out of the blue were probably too busy with their A/Mor o A/M ships to take notice. But then again, I've even seen old threads on other Merlin forum where Gwen haters were saying how they would stop watching the mostra in season 1 if A/G got together. So I think some people were just in denile and didn't want to accept it which is why they complained when they did get together.