Mike Krahulik, Penny Arcade's Gabe, has published an update to his experiences with the Surface Pro 3 that is an absolute must-read for anyone concerned about the tablet's suitability for artists.
He has been shown updates that I haven't seen that will clearly make a positive difference to users.
After I was done drawing I went out to lunch with some of the people from the team. I said to them “listen, I am an edge case. I don’t use this machine the way most of your users will use it. I understand this thing isn’t going to do everything for everyone.” Their answer was basically “why not?”
It's a great post and well worth your time. Check it out here: http://www.penny-arcade.com/news/post/2014/06/16/surface-pro-3-update