You probably have a plain black keyboard for your PC or a silver keyboard for your Apple. But why keep it boring and generic? Why not spice up your desktop with one of the keyboards from the list below?
The keyboards in the list are more or less useful, but one thing they all have in common is that they can replace your current keyboard in some situations. Granted you cannot write an essay with the Peregrine Gaming Glove, but then you can do something with that which you cannot do with your plain old keyboard.
The Kitty keyboard didn't make the list because you can't actually type on it, but wouldn't it look nice on your desktop?