Why the switch from analog to digital signal?

In NY, and if I'm not mistaken, the rest of the US the signal that television is broadcast on will be switched from analog to digital in 2009. I realize the difference between both signals and cannot find a mutually rewarding reason to switch the signals. Sure, digital looks better, but whats wrong with analog?... show more In NY, and if I'm not mistaken, the rest of the US the signal that television is broadcast on will be switched from analog to digital in 2009. I realize the difference between both signals and cannot find a mutually rewarding reason to switch the signals. Sure, digital looks better, but whats wrong with analog? It still works doesn't it? What can they broadcast on analog? Maybe use it for Wireless fidelity Internet? Any input would be great.
Update: So who bought the signal? What use can come from it?
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