I am surprised this has not been a topic of conversation here or perhaps it was and I missed it. It appears Directv can now switch from Satellite to IP stream in the event of signal interruption. This was a feature tossed around back when AT&T purchased Directv.
DirecTV can now quickly switch from satellite to broadband to avoid TV disruptions
The new SignalSaver feature is free for residential customers.
www.theverge.com