According to the Sports Business Journal:
The NBA is poised to become the first major U.S. sports league to stream live games in local markets, an aggressive offering that will set up a showdown between cable operators and regional sports networks.
The move marks the latest evolution in digital rights and adds fuel to one of the most contentious issues in local sports media as teams look to broaden their reach while operators look to protect the rights to their most expensive programming.
The plan would allow viewers to watch live games online within their local market for the first time. That could mean Chicago Bulls fans could watch live action on Bulls.com or on the team’s local RSN Web site, in this case, Chicago.ComcastSportsNet.com. Whether the online offering is free or not is still to be determined.
The NBA will use geo-blocking technology to ensure that people outside of a team’s territory will not be able to access its games online to comply with the league’s local marketing rules.
Note that this won't help out of towners trying to catch the games. You'll still have to sign up for League Pass.