Australians are pretty familiar with high tech sports enhancements, cricket probably uses them the most of any sport. You've got Hawkeye/Virtual Eye which are video systems that predicts where the ball would have gone if it hadn't hit the batsman being used by umpires for replays during the game, Snicko where a microphone is used to judge whether the ball hit the bat, and Hot Spot which uses infrared cameras to see if the ball made contact with the bat (or leg).

The yellow line is impressive because it's done on Live TV though not as a replay.

https://www.youtube.com/watch?v=pBFor0BgTEw

https://www.youtube.com/watch?v=H96PPrwVxMs

https://www.youtube.com/watch?v=_CTfREipYxc