As a proof-of-concept device Logitech’s Bluetooth Multi-Device Keyboard makes a good case for having a single device that works across a variety of systems, devices, etc, without having to fiddle much. But its scrunched size, lack of numeric keypad, and mobile-styled layout make it a tough choice for desktop power users while the heft, lack of keyboard cover (to protect those precious keys from dirt and other worldly hazards) make it impractical as a mobile keyboard.
Full review by Trent McGee on Popzara