I'm coming from the iPhone. I've held out long enough.
Actually the main reason* I'm upgrading is because of the 1080 camera. My wife is pregnant and we were looking in to a camcorder anyway. Believe me, I realize it pales in comparison as far as features go, but we'll always have it around. Coupled with a Lifeproof case, underwater 1080 should be fun (we live in Hawaii, so we'll be in the water a lot).
*also, I recently found out my wife sent 1000 texts last month. Our next bill will actually go down. 😱