
What’s new
• Front-facing video chat camera
• Improved regular back-camera (the lens is quite noticeably larger than the iPhone 3GS)
• Camera flash
• Micro-SIM instead of standard SIM (like the iPad)
• Improved display. It’s unclear if it’s the 960×640 display thrown around before—it certainly looks like it, with the “Connect to iTunes” screen displaying much higher resolution than on a 3GS.
• What looks to be a secondary mic for noise cancellation, at the top, next to the headphone jack
• Split buttons for volume
• Power, mute, and volume buttons are all metallic
What’s changed
• The back is entirely flat, made of either glass (more likely) or ceramic or shiny plastic in order for the cell signal to poke through. Tapping on the back makes a more hollow and higher pitched sound compared to tapping on the glass on the front/screen, but that could just be the orientation of components inside making for a different sound
• An aluminum border going completely around the outside
• Slightly smaller screen than the 3GS (but seemingly higher resolution)
• Everything is more squared off
• 3 grams heavier
• 16% Larger battery
• Internals components are shrunken, miniaturized and reduced to make room for the larger battery
The Full Gizmodo

From Slate.com:
SAN FRANCISCO—An Apple product unveiling is usually a bit of a letdown. That’s the downside of the company’s iron-fisted secrecy: The entire press gets so worked up that when the new device finally makes it to the stage, it inevitably seems far less grand than you’d imagined. (MacBook Air? Yawn.) But I won’t lie: I’ve been waiting for the Apple tablet for a long time, and in the moments before CEO Steve Jobs takes the stage this morning, I’m positively giddy. Rumors of the tablet’s existence go back at least to 2002; in all that time, the company hasn’t said a single solid word about it. So when Jobs finally spills the beans after about 10 minutes of wind-up, I’m floored. iPad? After all that time, you’re going to call it that, really? First, the features: It’s an aluminum-and-glass touch-screen machine that’s about the size of a Kindle. The iPad is extremely thin, and it weighs just a pound and a half. It runs on a proprietary Apple microprocessor, can hold 16 to 64 GB of data (depending on which model you get), and its battery (allegedly) lasts up to 10 hours. The device goes on sale in two months. (Apple didn’t say the exact date.) Prices range from $499 (16 GB, Wi-Fi only) up to $829 (64 GB and a 3G wireless modem). A cellular data plan through AT&T costs $15 a month for up to 250 MB of bandwidth and $30 a month for unlimited data. There’s no contract—you can cancel your data plan at any time without any fee. (When I asked an Apple rep whether iPhone owners could use the same plan for both devices, he didn’t know the answer.)