The U.S. economy has been working from a script that said "pause here until Iraq has been liberated." The pause is nearly over, so it's a good time to face up to the postwar state of the world. The technology sector is crucial to the economy, and personal computers to the tech sector -- and consumers and businesses no longer replace their PCs on cue. The U.S. computer industry will either deal with this fact or come screeching to a traumatic halt soon. Five years ago we were flooded with information; now we're drowning. Meanwhile, the distance between evolving hardware...