Reviewer Rob Redman over at 3D World magazine has just published his take on the Wacom Cintiq 13HD. It's a definite must-read for anyone comparing the Cintiq vs. the Surface Pro.
I recently found out that the device doesn't support multi-touch, which is a big disappointment. You'll have to step up to the 22-inch Cintiq for that feature. The other downsides Redman points out are the "annoying" cable and "smallish screen." I love the flexibility of cradling the Surface Pro and freely rotating it just like a pad of paper, but I wonder what Redman would write about our tablet's two-inch smaller screen?