TouchFire creator here to clarify a few things. TouchFire does let you rest your fingers on the home row. That's one of its most important features. Also, you can quickly retract TouchFire out of the way, letting you use the entire screen (see the video for a demo).

TouchFire is a really new idea, that in many ways flies in the face of conventional wisdom. I've actually spent most of career doing software. When I first came up with the idea, I thought it was pretty crazy too, for many of the reasons people are trashing it here.

What's so non-intuitive is that TouchFire works. And it works really well. It lets you touch-type on an iPad, while at the same time effectively disappearing into the iPad's cover when you don't need it.

We have found that actually using it is a very different experience than watching a video of it. Would people be interested in having a meet-up to try it out in person? We could do one in Seattle and one in the Bay area if there is interest...