Well, they will recover quite a bit of bandwidth with the change, and in a critical part of the spectrum to boot. But I suspect that there was a bit of lobbying that went on as well.

Going to HD will allow for greater regulation of the signals in the long run. The government always favors more control.
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)