Today’s keynote started at 10 a.m. at the Moscone Center to kick-off the World Wide Developers Conference (WWDC). Steve Jobs presented the new iPhone after first announcing some numbers about sales of the iPhone, the iPod touch and the iPad. The thing where people came for is ofcourse the iPhone. As is tradition lately, every year, somewhere in June, Apple shows us a new version of the iPhone. This year they introduce the iPhone 4.

iPhone 4 Design

The iPhone 4 has a completely new design. It comes in black or white, just the usual. But it has a stainless steel band, which functions not only as the phone’s antennas, the band also provides structural rigidity. The volume buttons are now separate plus and minus buttons. And there is the microphone, headphone jack, speakers, 30-pin connector.

The new feature is that iPhone 4 has dual-mic instead of only one. One mic is at the bottom and the other is right next to the headphone jack. This secondary mic is used to cancel background noise so you can have a clear and silent conversation.

iPhone 4 also has a new processor chip. The iPad offers an A4 processor chip and the iPhone uses the same A4 processor technology but pushed on an even smaller chip. This makes the iPhone 4 a fast mobile phone capable of smoothly executing tasks like multitasking, video editing, and placing FaceTime calls.

The battery is the largest component of the iPhone. It is designed to provide 40% more power. The talk time will go up to 7 hours on 3G and 14 hours on 2G. The Internet use will go up to 6 hours on 3G and up to 10 hours on Wi-Fi. The battery will last up to 10 hours while playing video and up to 40 hours when playing music. In other words: an impressive improvement.

New Camera System

The iPhone 4 has two camera’s and both of them are impressive. The normal camera on the back is now a 5 megapixel camera which produces sharp and crysp pictures. The exciting part is the fact it offers LED flash. So even in the dark, making pictures is fun. When you look on the front you’ll notice another camera. The front-facing camera is used for video calls. This features is called FaceTime and can be utilized in many ways. Click “FaceTime” to see FaceTime in action.

Just call someone and tap the FaceTime button to start video-chatting with each other. And with a simple tap you can switch between both the front camera and the one on the back. The FaceTime feature only seems to work on Wi-Fi. Apple will have to make deals with providers to offer 3G video calls.

The Retina Display

This technology allows for better and much sharper display of pictures, video and text. The pixel density is so high, your eyes  won’t even be able to distinguish individual pixels. This is what they call a Retina Display. The new 3.5-inch display has 4 times the number of pixels per inch. The ppi is now at a stunning 326. The contrast ratio is also 4 times higher, meaning every single color is just much brighter then you’re used to with previous iPhone models.

The iPhone 4 also offers IPS, the same technology used in the Apple LED Cinema Display and iPad. To top it all off, the glass of the screen is made of the same material used in trains and helicopters. It’s harder, more durable, more scratch resistant and even more flexible.

Video Recording And iMovie

The 5 megapixel camera has become something you’ll use more often then a normal digital camera. Since a phone (in this the iPhone) will be with all the time, it’s a perfect device to use for making pictures. But what’s even cooler is the fact it can now shoot video in high definition. Even in dark environments you can still make perfectly smooth videos.

After making a video you may want to edit it a little. Making the clip shorter for instance. But with iPhone 4 comes a brilliant new piece of software: iMovie for iPhone. The application will soon be available for just $4,99 and offers features like adding themes and transitions. It’s designed for multi-touch and offers you the possibility to also add photos and music.

As far as the information on Apple’s pages goes, it seems the iMovie app is only available for iPhone 4. No word on iMovie for 3GS or previous models.

Gyroscope

According to Apple the iPhone 4 is the first phone with a built-in three-axis gyroscope. This new sensor is capable of sensing advanced motions. It can now ‘feel’ when you’re moving forward or backwards, or up or down. This allows for a better gaming experience and people will probably come up with some interesting new applications.