The pen thing is actually a big win for business users, even if it doesn't actually improve on what's already possible with iPad stylii.

AFAIK, the stylus on the Surface Pro is significantly better than ones for the iPad/tablets with regular capacitive sensors.

I don't know why anyone would think otherwise, one supports real hardware-integrated digitizers, the other supports rubber nubs on sticks pretending to be fingertips.

It is pressure sensitive. It's a big win for artists as well. No need to buy expensive Wacom screens.