Because Aereo was selling a service of setting up and running that equipment for you.
I have mixed feelings on the whole case but your example isn't directly comparable.
Really though the whole idea of local broadcasts of national shows no longer makes sense. The networks should just live stream their shows online for everyone. This isn't in the interests of the local affiliates and probably is not legally feasible right now due to various contracts with them.
But because of technological changes we don't need local affiliates in their current form anymore. Of course there are local news shows and they are still valuable and networks should show locally targeted commercials but the old broadcast using local affiliates model doesn't make sense with modern broadband capabilities.
Tivo, for example, is also a middle-man that is doing essentially the same thing. Tivo grabs your paid (in this case) cable TV signal, and for a separate fee, records that content onto their hardware and allows you to stream it on devices and televisions without using the cable provider's own hardware.
> Because Aereo was selling a service of setting up and running that equipment for you.
That is a ludicrous precedent to set. Making your services available for everyone to purchase does not make the service itself a public utility. My sending an email containing a copyright file to myself through Gmail's service (which they offer to anyone!) is not the same broadcasting that file publicly and violating copyright, and it's insane to think that it does. This is why cloud service companies are up in arms about this decision.
He compares Aereo to a photocopy shop that provides users with library cards to access materials. Providing the copier and the card isn't a direct violation of the Copyright Act (via direct, volitional "performance" of a copyrighted work). Aereo may be guilty of a secondary violation (enabling a direct violation by others), but that wasn't the question before the court.
To make it even more interesting, this case was specifically about the "play" function of Aereo, and the Supreme Court wasn't addressing at all its "record" function, which is essentially returned to lower courts for them to decide (and I suppose only if Aereo continues to fight).
I have mixed feelings on the whole case but your example isn't directly comparable.
Really though the whole idea of local broadcasts of national shows no longer makes sense. The networks should just live stream their shows online for everyone. This isn't in the interests of the local affiliates and probably is not legally feasible right now due to various contracts with them.
But because of technological changes we don't need local affiliates in their current form anymore. Of course there are local news shows and they are still valuable and networks should show locally targeted commercials but the old broadcast using local affiliates model doesn't make sense with modern broadband capabilities.