You've undoubtedly heard a lot of the hype about iPhone 4, but now that we have one in our hands, we'll tell you the most important reason why it's worth it to buy one. It's a reason that's immediately obvious to everyone who first holds this trinket in their hands. We showed it to quite a few people already, and the routine is exactly the same: They pick it up, I say please don't drop it, and what do you think is the first thing they notice?