Obviously the sample size is small so far (2 games for some teams) and only the nerdiest of basketball fans will care about this, but here's a summary of what SportVU does.
http://stats.nba.com/playerTracking.html
Technology
So for example, the cameras can help teams (and fans) track who's getting the most points off drives, catch-and-shoots, and pull-up jumpers.
http://stats.nba.com/playerTracking.html
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.
Technology

So for example, the cameras can help teams (and fans) track who's getting the most points off drives, catch-and-shoots, and pull-up jumpers.