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The chunkier 5mm Type Cover, for the Windows 8 Pro version only, comes with a trackpad and keys for more heavy-duty typing. A built-in accelerometer means that both keyboards close down when they are folded up.
The Surface tablets will initially be sold online in the UK, with the Surface RT tablet set to launch alongside Windows 8, and the Pro version three months later. Timing for the UK release has not been announced.
Image credit: Josh Lowensohn/CNET News