Apple Lists 254 New Features for OS X Lion.

Accessibility
Address Book
AirDrop
AppleScript
Auto Save
Automator
Electronic Distribution
FaceTime
FileVault 2
Finder
Full-Screen Apps
iCal
iChat
Internet Restore and Utilities
Launchpad
Mac App Store
Mail
Mission Control
Multi-Touch Gestures
Networking
Photo Booth
Preview
Privacy
QuickTime Player
Resume
Safari
Screen Sharing
Security
Spotlight
System
System Preferences
Text
TextEdit
Time Machine
UNIX
Versions
Xsan
Other Features

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Apple Lists 254 New Features for OS X Lion | Tips | The Mac Observer

A new split keyboard has also been shown off in iOS 5.

iOS 5 will ship in the fall to the following devices: iPhone 3GS and iPhone 4, iPad 1 and 2, and iPod touch 3rd and 4th generation.

Twitter integration is also coming to iOS 5, with a single sign-in allowing a multitude of apps to make use of your Twitter credentials. That includes the Camera and Photos programs, finally letting you tweet images out directly from your galleries.

there's now a camera button right on your lockscreen! The volume-up button is also doubling up as a physical shutter release key when you're in the camera app. Pinch-to-zoom is said to be available right in the app, while holding your finger down on a particular area will lock down exposure to optimize the shot for its particular lighting. Some new in-device editing options have also been added, including cropping, rotation, red-eye reduction, and a one-click enhance option.

And the first new feature: an overhaul of notifications. At last! A new Notification Center aggregates all your, well, notifications into one and is accessible by swiping down a menu from the top of the screen. Yes, just like Android. Small X buttons alongside each note allow you to dismiss it, though there's no "clear all" option for the more decisive among us. Notifications are also making their way onto the lockscreen, where swiping across a text message takes you right into it.

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Apple's iOS 5: all the details -- Engadget