Interesting comparison... Not sure why they didn't mention the i7 Surface, did mention the i5, then showed the prices of the i3 (unless the i5 has significantly dropped the prices in the last month).
To me, it isn't really a apples to apples comparison. After using the Surface, I just don't see it as a tablet. The app store is minimal at best, after having touch and a mouse I go to the mouse 95% of the time. With screens being such high resolution (ie text and buttons are small) and detailed a finger is like using a paint roller instead of a paint pen. Its actual Apple competitor is the MacBook Air. The only thing in common with the iPad is the shape.
Looks like the iPad will be a better tablet and Surface will be a better computer. Just depends on what you want to use it for. I'm sure there will be a slew of new iOS apps that will use all that horsepower but until that happens, its just a big iPad.
Have the released how much ram the iPad Pro has? I'm not quite sure why apple has been holding off on the ram front. It only helps things and is very cheap. Their stuff has always been waaaaay more efficient than android but now that it is so cheap, not sure why they aren't using more of it.