Microsoft’s most fascinating announcement today was the introduction of its Surface Dial accessory. It’s a Bluetooth-powered puck that can sit on your desk or attach to the new Surface Studio display to provide contextual radial menus that you can interact with. It feels like a new form of input alongside a touchscreen, stylus, and traditional keyboard / mouse, and the Surface Studio won’t be the only device to benefit from it.

While you’ll be able to use the Surface Dial with any Windows 10 PC, Microsoft is also working on a firmware update to let Surface Book and Surface Pro 4 owners attach the Dial to their display and have the same functionality as the Surface Studio. Microsoft’s head of devices and Windows, Terry Myerson, revealed…

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