iOS 8 Beta 2 features:
App Store: you can now leave reviews and show Family Purchases. Also, Purchased items now sorted by purchase date rather than alphabetically.
Camera/Photos: Camera puts photo thumbnails to correct photos. Photos puts up a splash page offering to enable iCloud Photos, replacing your existing Photo Stream settings. There’re also related new Last Synced and Pause options under Settings > iCloud > Photos.
Messages: Camera and Voice buttons in Messages are no longer blue, the ability to mark all messages as read, new Raise to Listen option in Settings > Messages to let you “quickly listen and reply to incoming audio messages by raising the phone to your ear”.
Notifications: a new per-app Allow Notifications switch inside Settings > Notifications allows you to disable all notifications for a given app with one switch instead of multiple toggles.
Privacy: a new Home Data section in Settings > Privacy for apps that have requested access to home data via Apple’s new HomeKit platform.
QuickType keyboard: Apple’s new soft-keyboard with predictive suggestions is now available on iPad, though not on the iPad 2. Note that you must have Auto-Correct turned on to use QuickType.
Safari: a new feature called Quick Website Search, now blocks ads from automatically redirecting to the App Store without user content, pinch to tab view on the iPad.
Settings: Brightness control under Wallpaper and Brightness now works as expected, the Settings app remembers previous position when swiping back, Battery Usage by App in General > Usage > Battery Usage has a new No Cell Coverage label denoting how much juice your iPhone used when no coverage was available.
Various other features: Clock app remembers your last used tab; Handoff works between iOS 8 and Yosemite and is more functional though still not fully baked; AirDrop between iOS and Yosemite no longer requires having a Finder window open to receive a file; Apple’s Podcasts app comes preinstalled and can’t be deleted.