Introducing Android 4.0, Ice Cream Sandwich

Android 4.0, Ice Cream Sandwich brings an entirely new look and feel to Android. The lock screen, widgets, notifications, multi-tasking and everything in between has been rethought and refined to make Android simple, beautiful, and beyond smart
Download:
http://developer.android.com/sdk/index.html
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http://developer.android.com/sdk/android-4.0-highlights.html#UserFeatures

I loved this new features:

Android is continously driving innovation forward:

Android Beam for NFC-based sharing

Android Beam is an innovative, convenient feature for sharing across two NFC-enabled devices, It lets people instantly exchange favorite apps, contacts, music, videos — almost anything. It’s incredibly simple and convenient to use — there’s no menu to open, application to launch, or pairing needed. Just touch one Android-powered phone to another, then tap to send.

For sharing apps, Android Beam pushes a link to the app's details page in Android Market. On the other device, the Market app launches and loads the details page, for easy downloading of the app. Individual apps can build on Android Beam to add other types of interactions, such as passing game scores, initiating a multiplayer game or chat, and more.

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Face Unlock

Android 4.0 introduces a completely new approach to securing a device, making it even more personal — Face Unlock is a new screen-lock option that lets users unlock their devices with their faces. It takes advantage of state-of-the-art facial recognition technology to register a face and to recognize it later when unlocking the device. Users just hold their devices in front of their faces to unlock, or use a backup PIN or pattern

New camera capabilities

Developers can take advantage of a variety of new camera features in Android 4.0. ZSL exposure, continuous focus, and image zoom let apps capture better still and video images, including during video capture. Apps can even capture full-resolution snapshots while shooting video. Apps can now set custom metering regions in a camera preview, then manage white balance and exposure dynamically for those regions. For easier focusing and image processing, a face-detection service identifies and tracks faces in a preview and returns their screen coordinates.

Text-to-speech API

A new framework API lets developers write text-to-speech engines and make them available to any app requesting TTS capabilities.

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