Looking carefully at the images at Surface.com
and just noticed something in one of them:
The reflection on the Gorilla Glass puts the Windows logo behind the glass. I am assuming that logo is a button, because it makes sense to have that function. That would mean then that there are no buttons on the front of the tablet. A volume rocker can be seen in the same image and a power button must be around too
(haven't seen it in an image yet)
but did Microsoft just design a tablet with fewer buttons than the iPad?
Edit: Just looked more closely at the gallery images and there is only one physical button and the volume rocker.
It's looking like Microsoft has achieved the goal of a device with no physical buttons needed for the interface. Not a first though, as my Galaxy Nexus shows, but I seem to recall that being a goal Jobs had, but we still don't see with the iPad, iPod, and iPhone.