I hit on an idea, inspired by the
Orion glass cockpit project, to make the F1 useful as a computing environment in it's own right even given it's compact (though still full as far as your hands are concerned) size.
I will put a Bluetooth module in the device. For the slight extra expense you get the ability to have your phone or tablet serve as a secondary keyboard/mouse device.
The way it will work is that the keyboard will look at the active window on the PC and display a keyboard template for the given application you are working in. If you are working in a word processor, for example, your tablet will display all the available keyboard shortcuts for that word processor. If you press any of the Meta keys, the displayed template will show the keyboard shortcuts for the pressed modifier.
Keyboard shortcuts are great but they're often hidden while working with an application. This gives you access to those shortcuts in real-time.
If your tablet detects your moving your finger across it's surface it will forward your movement to the main PC as mouse movements.
I hope to render a concept image soon.