Supreme Court rules against Aereo

By Brian Stelter, CNN 

A huge win for the nation's biggest television broadcasters: in a 6-3 ruling, the Supreme Court said Wednesday that streaming television startup Aereo violates the Copyright Act.

Ever since Aereo was introduced in early 2012, its biggest financial backer, Barry Diller, has said that there is "no plan B" if the courts concluded that it was operating illegally.

Using thousands of miniature TV antennas, Aereo scoops up the freely available signals of local stations in cities like New York, Boston and Atlanta. It then delivers those signals to the smartphones, tablets or computers of paying subscribers.

Subscribers pick what to watch through a traditional on-screen guide. They can also record shows and stream them later.