Why, you ask? Tap the screen with your finger nails. Then tap a glass surface with your finger nails (such as a coffee table, or heck, even an iPhone screen). What do you think? I was convinced that it HAD to be glass in order for it to be capacitive. But then, I thought about the Palm Pre. The screen is the same material as the rest of the body, and no one the Pre's body is made of glass.