The app should soon be available on virtually any devices including the Pro1. The keyboard pass through seems to be working really well, at least on Windows PC. May have to put a bit more work to provide Android specific features when connected to a TV or streaming box for instance.
On Pro1 you will be able to use it with the keyboard open or closed. With open keyboard the screen serves mostly as trackpad.
All you need to do is match the keyboard layout settings with the host device and the keys are translated properly providing that they are available on the host keyboard layout. On