We here in the USA don't license (sorry, American spelling) our TV receivers. We have nice sky hooks (antennas/ae) that capture signals and through a miracle of electronics display said content on (in my case) a picture tube.
The Aereo people just have a longer cord from the receiver to the display. That is all they are doing.
No "broadcast" here, just a receiver and a long wire to the display. What could be simpler. Sure it gets around the provisions of licensing programs, but that is why we here in the USA have adverts on the telly.
Pretty soon if this goes on, having a TV receiver connected to a computer monitor might not be legal without infusing $$$ into someones pocket. Of course having my satellite receiver modulated on channel 34 on my private cable so I can use multiple receivers might not be too legal either, but I don't worry.
P.S. I don't steal beer either.