Apparently the released version of the Microsoft Surface version this week isn’t the full version.
The version now is more like a tablet (example: Apple iPad) with an app store. This means it cannot do productivity stuff yet. But according to this video the 2013 version will be running Windows 8 (think next version of Windows 7) which means you can install some if not all programs you use on a notebook or PC computer. It can do this because of the higher end processor, Intel verses the ARM in the just released Surface.