Alongside the release of iOS 7.1 beta, Apple has issued a new Apple TV software beta. The new beta specifically “enables users to mirror content of an iPad to an Apple TV using AirPlay.”
The update doesn’t go into too much detail to explain what this statement refers to, but I expect it is tackling some issues which have arisen from the recent enhancements to AirPlay on Apple TV as a result of the new iOS 6.0 firmware recently deployed to Apple TV.
If you’re a developer you can find the Apple TV software beta in the iOS developer center. Apple notes that this latest firmware is being provided to test the latest AirPlay functionality with iOS apps.