> 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.