So after months of speculating, everything that Gizmodo showed us on its infamous blog post turned out to be correct. The prototype that was lost in a bar in Redwood city back in April was indeed the next generation of Apple’s mobile device.

With the recent news that Android devices have been outselling the iPhone in the US, it seems likely that everyone has been waiting for this. Twinned with the release of the new iOS 4 (which is now the official name of iPhone OS), this next generation of hardware should put Apple back on top.

So the new iPhone 4 features:

  • The thinnest smartphone in the world, 24% thinner than the iPhone 3G/S
  • 7 hours of 3G talk-time, 6 hours of 3G browsing, 10 hours of Wi-Fi surfing.
  • 300 hour standby battery life
  • 960×640 screen resolution with 326 pixels per inch (your eyes can only see 300 of these!)
  • 5 Megapixel camera with flash
  • Front facing camera for video chat
  • Full HD video recording
  • 3-axis gyroscope
  • Glass body
  • Apple A4 processor

The new iPhone 4 wowed developers during Apple’s World Wide Developer Conference in San Francisco. Steve Jobs was predictably excited at being able to share the new features with the audience, “iPhone 4 is the biggest leap since the original iPhone,” while also poking fun at the leaked prototypes by adding “I know some of you have seen this before.”

Borrowing heavily from the iPad design, the new device is only 9.3 mm thick, or 24 percent slimmer than last year’s iPhone 3GS. The glass-body enclosure has a very slick looking flat-slab design (meaning we’ll need to buy yet another dock), and will be available in black or white with several colours available by purchasing an extra “Apple bumper” case.

Early impressions from developers have been very positive, with the new display causing the most excitement. According to Jobs, 300dpi is around the limit that the human eye can distinguish, so they’re calling the screen a “retina display.” In layman’s terms, on the same sized screen as the iPhone 3G the iPhone 4 packs in four times as many pixels. Older iPhone apps will appear sharper, and developers can code apps specifically for the higher resolution.

The gyroscope is an interesting addition. The iPhone 4 still comes with the accelerometer present in previous devices, but can now detect 6-axis motion, meaning applications can use the new CoreMotion API for very precise movement detection. A compass, ambient light sensor and proximity detector are all present in the new device.

The camera has long been a complaint many people held about the original iPhone and the 3g. The iPhone 4 includes a new 5 megapixel camera complete with an illuminated sensor for quality in low-light situations, and is capable of recording HD video at 720p/30fps, meaning companies like Flip and Kodak should be very worried.
A version of iMovie will be available for the new iPhone, meaning you can edit movies with effects, transitions and titles directly from the device.

Perhaps the most hyped feature of the new phone is the addition of a front-facing camera. Video chat has been rumoured in every iPhone mock-up since the original launch in 2007. Twinned with the rather cheesily named “FaceTime” application (what was wrong with iChat?), you can now make direct video calls to other iPhone 4 users, as simply as pressing the option while calling. Early demos suggest the video quality is very good.

iOS is now the official name for Apple’s mobile operating system, and version 4 will feature multitasking, new organisation systems and applications such as the iBooks book-store, and iAds advertising platform. iOS 4 will be available from June 21st as a free upgrade to current iPhone, iPad and curiously, iPod touch users, who don’t have to pay this time!

If you’re already drooling over the feature-list and want to get your hands on an iPhone 4, you will be able to pre-order from the 15th of June, and it’ll be released on June 24th in the UK, France, Germany, USA and Japan with 88 countries having the device by September.