AirPlay Mirroring is a feature that first made its appearance on the iPad 2 and iPhone 4S. It allows you to wirelessly stream whatever’s on your iPad or iPhone display to your HDTV via Apple TV. The Mac implementation is reportedly going to be similar, allowing broadcast of your desktop to your TV.
AirPlay Mirroring for the Mac will allow a user to wirelessly mirror exactly what is shown on their Mac’s display to an Apple TV connected to a projector, television, or external monitor. AirPlay video streaming is also being integrated into QuickTime X.
iMessage is Apple’s new messaging solution for the iPad, iPod Touch and iPhone found in iOS 5. It allows customers to send SMS-like messages over standard data connections rather than expensive text messaging plans. OS X Lion integration with iMessage would allow you to send iMessages to friends and family with iOS 5 devices from your Mac.