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 960x460 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
Other changes observed in the device compared to the current iPhone include a glass or shiny plastic back, 16% larger battery, and a slightly smaller but apparently higher resolution screen.
source: http://www.macrumors.com/2010/04/19/apparent-next-generation-iphone-gets-a-thorough-hands-on/
ZOMG can't wait~