AirPlay is Apple's wireless tech of streaming 720p media from iOS devices to the Apple TV. Eric Govoruhk and Kelly McAteer developed a full HD 1080p video mirroring for iPad 2 by using a wireless HDMI transmitter and a USB battery pack.
Here's Eric explained how they pulled it off:
Basically, we were tasked with the coming up with ideas that could help a client with their presentations. Sometimes they run Keynote Presentations on a Mac, and sometimes they run Keynote Presentations on an iPad using a VGA adapter. While I liked how mobile you could get doing it off an iPad, you're still literally tethered by the cable running to A/V equipment. I knew there had to be some sort of solution, but sadly there wasn't, at least not all in one place. So I started looking at combining different solutions, and luckily, not many were needed. The core components are the wireless HDMI transmitter, and a USB battery pack.
Oh, and of course the iPad 2.
Everything is very rough, especially the housing. This all came together very quickly, and we're still working everything out. I just wanted to show you guys, because I know some of you are looking for similar solutions. I'm going to try and get an Instructable together once we get everything a little more finished. Maybe even try some other things, like a belt pack for those that don't want the added bulk in their hands, or what ever other ideas our tiny little heads can think of.
Check the video embedded below: