Looks like impossible to use it with just the one screen, as you are then looking at the back of the display. Don't think this is gonna be a great success. The other 'folding'/double display laptops seem to have a more practical layout.
I suppose you'd have to make sure it was turned off to not be broadcasting your screen to the world.
- Just look at the back of my laptop instead of the projection/TV.
- You want to see more? Sure, let me tilt it. Now I see less. Perfection!