Yes, it's true: Apple announced a stylus for the iPad. Ahem, excuse me: A Pencil. At no point during Wednesday's announcement did the company use the dreaded S-word, preferring "pencil," "device," and a few other monikers. But a stylus the Pencil is, and an exciting one at that. Here's why I'm pumped for the Apple Pencil—and what I'm still worried about.