I followed the Apple WWDC 2010 loosely via a liveblog since I was at work during the event, but since then I’ve been closely following the reviews and reports on the iPhone 4. I’m impressed, REAL impressed.
Specs avail from apple here:
http://www.apple.com/iphone/specs.html
but, let me break down what matters most to me:
1) Class. The thing is fucking gorgeous. . . . I’m a huge sucker for industrialesque design where form follows function, and the iPhone 4 does this in a way that just shuts the door on other smart phones out there, including their own 3G and 3GS iPhones. The “original iPhone” with it’s metal back, and game-changing all glass front is a close second to this, and I’m SOOOO glad they’ve gone back to this type of design. The metal sides on the iPhone 4 are actually antennas, and the front and rear are a special engineered glass that’s stronger and more durable than anything found on a smartphone before.
2) 720p 30fps HD video. Damn straight, HD video onboard. Quit shopping for a newer video cam to replace your aging Hi8 or miniDV behemoth you currently haul to “events”, because the iPhone 4 just obsoleted them. It’s not that there aren’t dedicated cameras out there that will do a better job than this one, there are. But, this one will do a better job than what 99% of people already own for a video cam, and it’ll always be at the ready, in your pocket. I won’t even talk about the convenience of quick edits and youtube/email straight from the phone. It’s a given.
3) 960×640 display. Apple calls it a “retina display” which I’ve never heard of, so their marketing dept. probably invented it. Regardless, that’s a HUGE amount of pixels for such a tiny screen. Reviewers are saying even at a distance from their eye of only a few inches, they can’t make out the pixels in the image. I’m sold, porn will no doubt look amazing 
4) Front-facing 2nd camera. To be honest, it’s about time the iPhone gets this. Ever since the original iPhone came out in 2007, people have had half-baked ideas about some crazy mirror to use the rear cam for video calls as the iPhone seems otherwise so well fit for this type of use scenario. Now folks can quit pretending to be inventors, and just go buy the new iPhone. Apple didn’t talk about supporting anything other than “FaceTime”, but Jobs did promise to make it an open standard, and with the app store, I’m sure the front cam will have 5000 uses a week after launch date. Chatroullette anyone?
5) Maximum operating altitude: 10,000 feet. Just kidding, wanted to see if anyone was even still reading 
Bottom line, it’s available June 15th, and you’ll find me hitting refresh on the order page starting at 11:55pm on the 14th.