Here's a list of some them.
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1. It supports the full version of Windows 8 and therefore any applications that run on Windows 7.
2. Has enough horsepower to run Windows 7 in a virtual machine for those who hate Windows 8.
3. It can join business network domains, which is a BYOD plus.
4. Two choices of keyboards which are removable and can swing 180 degrees to fold under the device for tablet and notebook use. A switch in the hinge shuts off the keyboard when it is folded back.
5. 720p front- and rear-facing cameras.
6. Support for USB 3.0.
7. The video/audio out port supports true HD at 2560 x 1440 external displays, which is better than the 1920 x 1080 screen on Surface Pro itself.
8. It's compact, thin and relatively light at 2 pounds.
9. A power-supply USB port enables charging devices when it's inconvenient to tie up the single USB port in the edge of Surface Pro.
10. The magnesium case seems sturdy and solid.