First of all, many pirates are supported by the same media corporations and their governments. For example, Red China is the biggest pirate in the world, and yet receives "Most Favored Nation" status by the U.S. In return, the U.S. gets cheap labor. (It's not coincidental that the same DVD boxes and other parts are made in China and other countries.)
Second, the same media companies are now manufacturing or investing in manufacturers of CD copying technology. Soon, just like CD burners, the prices for DVD burners and disks will drop.
Third, just like LDs and CDs, the same media companies change formats often, forcing consumers to upgrade at the same or double the price. Just like cassettes, LPs, LDs, VHS tapes, and CDs, it's possible that in the future (probably even the near future!), DVDs will be replaced by another format.
Sure, we can hope that the format will stay. That's what they said about the LD.