I agree with this somewhat. Which is why complete use of video replays is impossible right now.
They are different in the sense that there technically isn't a grey zone. A lot of decisions around the park might be up to interpretation. Whether the ball is in or not is pretty much fact (I know you'll say that sometimes replays aren't that conclusive either way but those are even rarer scenarios within already rare scenarios).
I'm all for keeping it flowing too. That's why the Hawkeye thing is perfect and the only "technology" that is truly applicable right now.
It would simply beep or whatever when the ball goes over the line. So in the scenario you propose there would be no going down the other end it would be a goal. And even if there is a slight margin of error it would be so much smaller than what it is now.
For FIFA to just throw this idea out straight away and not be prepared to even work on it is just pathetic.
I can get why using replays for everything can't really be implemented... but goal line technology surely must happen and seems so easy to make happen.
FIFA Fair Play and all that
Just seen this tshirt:
http://www.whoareyadesigns.com/v/vspfiles/photos/NWC2-2T.jpg
http://www.whoareyadesigns.com/newcastle_football_beer_p/nwc2.htm
Nice design... the small print has put me off a bit though
Tricky one. I guess had it touched someone else it would have counted... but seeing as with a goal kick the ball has to clear the penalty box before someone on the same team can touch it, had the keeper touched it in it wouldn't have counted either.