I have an Android app that's use to find local bus times for my area. It makes around 150$ per month after optimizing AbMob ads. It generated around 50$ per month at first.
I got to try this out when he was showing it in Toronto. It was a couple of months ago, so what I remember might not be exact.
- The demo included glowing hands of ice and fire. I did see my own hand with ice and fire glowing from the finger tips. I'm sure I saw it as blended around my fingers, rather than an overlay on top.
- There was no latency at all, he let me type some stuff out on the virtual keyboard and the feedback was instant.
My only problem was it kept falling off my nose :)