Yep, what he said. Although, they do aid with the goal/no goal.UEFA started using them in European competitions to aid referees with decisions in the penalty area (I think) nothing to do with goal/no goal
Quick side note, but did anybody else think that Kolarov's tackle deserved a red? Lunged in with both feet off the ground, commentator himself even said 'Yeah, it was one of those - studs showing, both feet off the ground. Always a yellow' (?!?!). Replays didn't show it favourably either...