What is new in After Effects CC (2014)?

Keying effects - Preserve fine detail when keying compressed or poorly shot blue-screen or green-screen footage. Use the Advanced Spill Suppressor to control the amount of green spill left in green-screen footage. 

Live Text Templates for Premiere Pro - Package your After Effects compositions as Live Text templates so Premiere Pro editors can change the text without changing the text color, motion, or lower-third background. 

Flexible masking options and Premiere Pro Interchange - Use masks to apply effects to specific areas of your compositions — no need for additional adjustment or track matte layers and blend each effect individually into the original layer. Import masks from Premiere Pro via Dynamic Link for further refinement. 

Kuler integration - Create color themes using the Adobe Kuler app on your iPhone or in your browser, and then sync your swatches to After Effects for use in your compositions.

Mercury Transmit - Get full-screen previews of your composites on a separate monitor. Send previews over interfaces like HDMI from a graphics card without additional hardware.

Media Browser enhancements - Navigate your media locally or across a network via Adobe Anywhere, and access complex media types like P2 and XDCAM as media, not as nested folders.

Typekit Integration - Access a variety of fonts from Typekit for immediate use in your After Effects projects. 

Panel Integration support - Find and install plug-ins, extensions, training media, and other content via After Effects panels created by the developer community.

And so much more - Also includes: Faster performance in the Warp Stabilizer VFX effect; the ability to import Sony RAW footage from F5, F55, and F65 cameras; scripting access to render settings and output module settings; and more. 

See full release notes :  
https://helpx.adobe.com/after-effects/using/whats-new.html

System Requirements

-Multicore Intel processor with 64-bit support
-Mac OS X v10.8 or v10.9
-4 GB of RAM (8 GB recommended)
-5 GB of available hard-disk space for installation; additional free space required during installation (cannot install on a volume that uses a case-sensitive fi le system or on removable flash storage devices)
-Additional disk space for disk cache (10 GB recommended)
-1440 x 900 display
-OpenGL 2.0–capable system
-QuickTime 7.6.6 software required for QuickTime features
-Optional: Adobe-certifi ed GPU card for GPU-accelerated ray-traced 3D renderer

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Homepage :  
http://www.adobe.com/products/aftereffects.html?promoid=KFMVM