I will give you a recent example. In Boston after the Marathon bombing, they turned off cell phone access because they were afraid it was being used to set off the bombs. So, millions of people in the middle of a city are cut off from information and in the grip of terror. I will give you more. Cell phone towers often go out in hurricanes or tornadoes. Yet all you need to watch DirecTV is power at your house. Not a good plan. Cell phones are not reliable in all cases. Not to mention that your plan would put a much larger burden on the cell phone networks as they are not broadcast. Then you get the condition of the football game I was mentioning. A stadium of 70,000 easily knocks out multiple carriers in that location. Say half of them are using data (they are not, more like 1/5) and there are three major carriers. That means 10,000 users are knocking out a cell. The idea is not a bad one, it is just no where near where we are with the technology and the penetration of that technology (like little old ladies who just want to turn on their TV and watch the weather, etc.).