There is so much controversy surrounding this question I thought I'd ask again. I did buy a bumper, as this seemed like good insurance against dropping the phone, but with Apple swearing up and down that their new screens are scratchproof, and the rumor that Apple is going to remove screen protectors from their stores and their site, are those protectors really a must have?
I've been carrying my new iPhone 4 in the same pocket as my keys and not one scratch -- so far. I love the looks of the new phone and hate the idea of sealing it up -- the bumper just seemed like cheap insurance and gives the phone a little better grip. I did use a screen protector on my old Palm, but I was writing on the screen with a stylus, not tapping it with my finger.
If I have to put a protector on I will, but they are a pain in the butt, IMHO. What say you?
I've had my iPhone 4 since launch. I keep it in my pocket all day (except when I'm using it) and there isn't a single scratch on the screen. The only thing is that there are some marks underneath the bumper. I agree that screen protectors are a pain, and I would say go without one.