It's been a very lively, entertaining WC so far.
There seems to be an excellent atmosphere at the games and that really translates on the broadcasts.
I don't think it's true at all that we haven't seen quality - the time, the circumstances and execution of Messi's goal yesterday for example.
I reckon the team with the least woeful defence and the most talented strikeforce will win.
The teams with the more average strikers will go home first
To some degree poor poor refereeing and extreme conditions always have an influence but I don't think one specific team will get through every game with just the help of the ref alone.