Germany deserved to win, whether the score was 4-1 or 4-2. But I think the point is that the rules of football arent being adhered to. Yes, that one goal would not have saved them, but thats not the point. The point is that the final score is inaccurate because the rules were not followed. It crossed the goal line, it was a goal.
In this case we were lucky that the final score was 4-1, but what if it was 2-2 and then germany scored in a penalty shootout? If that goal was allowed, it would have then been 2-3 to England. So in this case it might not have mattered, but in others it could make all the difference in the world. That USA goal against Slovenia (was it?) is another case in point.
But they wont introduce goal line technology, because football fans like drama, and the powers that be in the sport like it when the ref has a lot of power because it makes bribery more effective. So, it wont change. Just as the players like to scream like little girls whenever another player taps them on the shoulder, the fans actually love getting angry over controversial calls. If football wasnt so controversial sometimes, it wouldnt be as popular.