
Technology is playing a key role in improving multiple aspects of sports. Here is a quick view on some of the impact areas
1. Improving Viewing & On-Screen Experience- Live technology
Hawk Eye
Used in Cricket, Tennis, Football -

Ball tracking technologies using multiple cameras
Snickometer
Used in Cricket

Uses Oscilloscope to track & calculate the frequency, distortions and wavelength of sound waves
Hot Spot
Used in Cricket

Uses infrared imaging system
VAR (Video Assistant Referee)

VAR is being used in Football and has helped in reducing the referee errors related to Goals, Penalties, Red Card decisions and Mistaken identity
Goal Line Technology
Used in Football

It uses a set of high speed cameras focused on the goal to determine the exact location of the football using coordinates
2. Performance Improvement & Analytics
SOFTWARE
Elo Score

The Elo rating system is a method for calculating the relative skill levels of players in zero sum games such as chess. Many sports now use this framework
Sabermetrics

uses statistical analysis to analyze baseball records and make determinations about player performance. (ref: Moneyball Movie)