Preview at WWDC likely in June, followed by September launch.
Apple Releases iOS 7.0.4 With Fix for FaceTime Call Issue
Bug fixes and improvements, including a fix for an issue that causes FaceTime calls to fail for some users.Apple has also released iOS 6.1.5 for the fourth generation iPod touch, which fixes the same FaceTime issue. A new version 6.0.2 of the Apple TV software is also available, although it is unclear what has been changed.
For information on the security content of this update, please visit this website: http://support.apple.com/kb/HT1222
iOS 7.0.4 comes just over three weeks after the release of iOS 7.0.3, which added support for iCloud Keychain and fixed accelerometer issues. iOS 7.0.4 can be downloaded via the software update tool in the settings menu on iOS devices.