Stop. Take a deep breath. Before my headline gets you all worked up, consider what I'm saying here. The CD and other optical discs, like DVDs and Blu-rays, are obviously going to live on for a while as a way to transport media. But make no mistake that today, with two unveilings, Apple has effectively sealed the fate of the optical disc in the computer industry. Soon, it will go the way of the floppy disk... First of all, the first-generation Airs were a bad combination of underpowered and overpriced. That is no longer the case. Second, they required some...