Now that the excitement has subsided somewhat, here’s a quick recap of some of the iPhone 4’s coolest features. They include the all-new Retina Display, 5.0-megapixel camera, and more. Continue reading to see them all.

1. Retina Display

With pixels just 78 micrometers wide, the retina display in Apple’s new iPhone 4 packs four times the number of pixels into its 3.5-inch display — compared to the 3G S — resulting in a very impressive 326 pixels per inch. That’s not all, the display also uses IPS (In-Plane Switching) technology to achieve a wider viewing angle, which comes in handy for both movies and web browsing.

2. FaceTime

Using FaceTime is as simple as pressing one button. That’s right, you won’t need any special software or a separate account for video calling. Simply find a contact who’s also using an iPhone 4 handset, tape the FaceTime button, and you’re ready to chat. Or, if you’re already on a voice call, just tape the FaceTime button and an invitation will appear on their screen.

3. 5.0-Megapixel Camera

A major upgrade over the 3G S’s camera, the new iPhone 4 features a 5.0-megapixel shooter, complete with LED flash that allows for improved low-light shots. Plus, the front-facing camera (0.3-megapixels) makes it easy to take self-portraits. The camera retains auto-focus, but the software also allows you to tap anywhere on screen to focus on a particular object.

4. Multitasking

Not specifically an iPhone 4 feature, but rather an iOS 4 software capability, multitasking enables users to switch between apps quickly and smoothly. This means you can listen to audio in the background while checking email, complete tasks in the background, keep GPS running, and lots more.

5. iMovie

Finally, iPhone users can now edit their videos directly on the phone, and in 720p resolution. The $4.99 app was designed specifically for multi-touch, which means you’re able to trim clips by just dragging your finger across the screen or slide to quickly scrub through scenes.