For more information visit: support.apple.com
Unedited release note follows:
Apple TV (2nd generation)
Apple TV Software Update 4.1 features
Summary: With the new AirPlay feature, Videos, Photos, and Music can be streamed to Apple TV from iPhone, iPad, and iPod touch with iOS 4.2 or later. AirPlay also enables video and music to be streamed to Apple TV from a Mac or PC running iTunes 10.1 or later.
Summary: The VoiceOver accessibility feature brings screen reading to Apple TV, making it easier to use for those who are blind or have impaired vision. You will hear a description of the menu item currently being highlighted by the cursor, other onscreen text, and feedback on video and audio controls. VoiceOver speaks all 18 languages available on Apple TV.
Feature: Connectivity and performance fixes
Summary: Apple TV Software update 4.1 includes performance and connectivity fixes for Apple TV.