Plenty of mobile device screens can easily resist minor cracks and scratches, but let's be honest -- those aren't the biggest problems. No, the real crisis comes when you drop your phone and the display shatters into many pieces. Thankfully, Corning is tackling that accident-related damage in earnest with Gorilla Glass 4. The newly formulated cover material is designed to survive collisions with rough surfaces, like the sidewalk. It's reportedly very effective, if imperfect. While conventional soda-lime glass will always break if you drop it from a meter (3.3 feet) above the ground, Gorilla Glass 4 will remain intact 80 percent of the time. You shouldn't be careless, in other words, but the added resistance could mean the difference between a costly out-of-warranty repair and carrying on with your day.