Two problems with that. One, your receiver doesn't know where you are, and two, your receiver has to be programmed to receive the locals for the market where you are. A single spot beam can carry the locals for more than one market, with the downloaded software determining which ones you receive. Could a GPS be incorporated into the receiver? Sure... Except the vast majority of subscribers have no need for it since they stay in a fixed location, making the required hardware/software development unlikely to ever happen.