This comment, at the very end of the article, is the most important statement there. As technology becomes increasingly powerful and increasingly less expensive, we lose our advantage. Small countries, small organizations, and maybe even individuals may obtain destructive powers beyond our ability to defend against adequately. Yes, we'll still have many times their power, but if they can destroy, say, one of our cities, does it matter?
To put it another way, we may take advantage of this technology now. But once Iraq or al-Qaeda gets the technology too, we'll be worse off than if it had never been invented. The balance of power, which has been very much in our favor, is very slowly tipping away from us. This is a long-term trend, and we should be able to hold on for a long time. But the world will look very different in 200 years.
The weapons mentioned in the article are just one example. The same thing is happening with biological and chemical weapons, and perhaps to some extent with nuclear weapons. Computer technology is available to everybody, and this is the key to low-cost control.
The level of disorder in the world is on the rise, and the ability of large countries and organizations to project power effectively is on the decline.