iPhone 4 has been launched and one that is worth noticing is that its 24% slimmer than iPhone 3GS and is *all glass and stainless steel*.
Another important feature, as mentioned by Steve Jobs is the ‘retina display’, i.e. IPS-technology based screen.
The iPhone 4 screen is 960×640, giving it four times as many pixel as the iPhone 3GS. The 800:1 contrast ratio is also four times better than the iPhone 3GS.
Jobs announced the new iPhone will be powered by Apple’s proprietary A4 chip, which is at the heart of the new iPad. This will give the iPhone 4 longer batter life, including 40 percent more talk time.