http://www.cedmagazine.com/ced/2005/0605/06cc.htm
At least, that seems to be the jist of it according to this opinion article.
I think it's interesting that consumer level video technology, and information technology in general, has changed from analog to digital so quickly when digital is so much easier to copy at the consumer end.
With a government that is walking hand in hand with big corporations looking to decrease "piracy", it seems weird that the push over to digital was made with such haste.
There's no doubt that digital is much more efficient for transmitting large amounts of data at high rates, but it certainly can be done analog. Perhaps it's also easier for the government to keep tabs on us this way with just a simply click of the mouse.