Since the Surface Pro 3 that I and all other tech reviewers received last week is a pre-production unit, there are a lot of minor tweaks and software fixes that Microsoft intends to publish before the devices begin shipping June 20.
That being the case, anything you read between now and then about compatibility and performance is likely to change.
One thing that won't is the new Surface Pro 3 pen. Thus far, reviewers have talked about the pen in isolation, but I thought it would be helpful to show it in comparison to some of the more popular Wacom-compatible options.
I've enlisted the aid of the amazing Ray Frenden to develop a brush that will allow us to better evaluate the performance of the pen and the N-Trig digitizer vs. the existing models. I'll have that up as soon as possible.