Popular racing game Real Racing 2 HD for iPad 2 will support AirPlay Mirroring.
Guys at Engadget have posted a Hands-On-Video of Real Racing 2 HD using the AirPlay mirroring feature.
According to Engadget,
For this game (and we imagine many more to come), you use the iPad as the controller — both while navigating through menus and in race mode — while the game appears only on your TV (though the tablet does display some vitals, and a map of the track). There’s noticeable lag between the iPad and Apple TV when using AirPlay, which may be an issue for games where timing is important, such as Rock Band, but didn’t seem to set us back while playing Firemint’s racing game.
iOS 5 beta will expire on 4th August,2011 and will be released to public this fall.