The touch buttons aren't just an extension of the screen. For example, they don't provide visual feedback when they're active or activated, and when you're look

The touch buttons aren't just an extension of the screen. For example, they don't provide visual feedback when they're active or activated, and when you're looking at the screen, they look like they're part of the bezel. Note that while you're using it, you never accidentally hold your phone with a finger covering your screen. That's because you're looking at the screen. You know where it is. It's bright. It's easy to see its edges. It's the focus of your attention. The bezel around the screen, on the other hand, is not, but merely touching it in the wrong place will cause your phone to do unexpected things.