[dorkwood]

I once worked for a company that created a large AR installation for an event. People could see themselves up on a big screen, and were able to "collect" digital items by waving their hands as they floated by. The only thing is, the company wasn't able to get the hit detection to work reliably, so they instead opted for a guy sitting at a computer in a room off to the side, where he would click on a screen to mimic realtime interaction.