SCOTUS has been pretty much bought and paid for by NAB/MPAA/RIAA and big business in general, so I don't expect a ruling in favor of consumers.
BigTech is worth far more than BigHollywood right now. A decision against Aereo could have negative implications on cloud providers.
What will SCOTUS decide? Will be close. The ruling allowing consumer recordings of TV programs (Universal v Sony) was a 5-4 decision.