You should read the entire article. The answer to your question is there.
"The gear wasn't cheap—any NBA team that wanted this information had to pay roughly $100,000 for the installation of the cameras and computers in its arena. By the end of the 2012–2013 season, only 15 teams had done so, and the data had huge gaps—only about half the games were captured. But the data that was there looked like it had a lot of potential. In September 2013, the NBA signed an agreement to install the system in every arena in the league."
Then there's the following info from nba.com
http://stats.nba.com/tracking/#!/player/
What is player Tracking?
Player Tracking is the latest example of how technology and statistics are changing the way we understand the game of basketball.
Using six cameras installed in the catwalks of every NBA arena, SportVU software tracks the movements of every player on the court and the basketball 25 times per second. The data collected provides a plethora of innovative statistics based around speed, distance, player separation and ball possession. Some examples include: how fast a player moves, how far he traveled during a game, how many touches of the ball he had, how many passes he threw, how many rebounding chances he had and much more.
The information will be available to fans on NBA.com and NBA TV.