"Watch ABC" will debut this fall and allow viewers to watch the network from mobile devices and tablets when they are away from home. Watch ABC will basically be a live stream of the network's feed as well as local programming such as news.
There are some catches. The service is only available to people who already have a pay-TV provider. Also, it will initially not be available in every market because ABC needs to reach distribution agreements for Watch ABC with all its local affiliates.
The first two markets to have Watch ABC will be New York and Philadelphia starting May 14, where ABC owns the stations. Then ABC will roll the service out to other markets where it owns local TV stations including KABC-TV Los Angeles.
and a few more bits of info about it from the NY Times
While Apple devices came first, other phones and tablets will be supported in the coming months, Mr. Cheng said. Securing the necessary rights from programming providers was laborious, but ABC will be able to stream all of its stations local newscasts, syndicated talk shows like Katie, and national series like Greys Anatomy.
In the future, ABC will withhold its most recent TV episodes from the free versions of Hulu and ABC.com, further limiting access to paying subscribers of cable and satellite providers only.