I can't imagine having to lift and put back that keyboard every two minutes. Surely if you need a keyboard you get one, not one that overlays half the screen.
No need to lift and put back every 2 minutes! TouchFire remains attached but can fold out of the way very quickly when you want to use the whole screen, and unfolds back when you want to use it again. See the Kickstarter video for a demo of this, about 1/3 of the way through...