I've carried an iOS phone in my pocket for 3 years now, and they always live up to my expectations. iPhone 4 is no different.
The hardware upgrade is huge with this device. The original iPhone felt like a luxury device, with the iPhone 3G and 3Gs the phone reached such popularity that lost that luxury status and feeling. iPhone 4 oozes luxury, the sleek, solid, form factor give the device a nice weight in the hand but a slim profile in the pocket.
The new camera system is also a big improvement. Screw carrying a Flip or a point and shoot camera, or for bothering to keep Skype running in the background on my laptop hogging RAM for that matter. You got my number?? Facetime me.
Even the built in speaker, volume buttons, and mute switch are improved.
iOS 4 makes all the right moves. Despite its lack of a notification management system and active desktop widgets, this is still the OS to beat in the mobile space.
Back in June 2007 nobody really knew what to do with a dead simple, super functional, computer in their pocket. iPhone lets people now do everything they can't live without plus cutting edge new features, at blazing speeds, in the tiniest package, with unbeatable battery life to boot. There is no iPhone killer, except the next iPhone. Get you're own so you'll stop asking to use mine.
(Sounds like I drink the Kool-Aid, I know. But I'm a PC. And every device has flaws. Love it or hate it, iPhone is its own world.)