AirPlay barely allows 720p video out and that too just with iOS devices. To get the full experience, get ready for some hacking with an external hardware tied to the iPad. This is done using a wireless HDMI transmitter, USB battery pack, and a home-made enclosure that “only adds about two pounds of weight” to the otherwise portable device. Even you can do it yourself without much effort .
Lets hope that a Jailbreak hack comes in that lets you stream 1080p over Wifi using DLNA to your HDTV. Oh yea, your wireless router might peak out even on Wireless N router.