Glad you guys finally got to a scholarly discussion of this topic (I have been requesting this topic for quite awhile). We have a guy in our board game group who is about to get a 3d printer and he had all of our group excited about it. I was sad that the game Pocket Tactics off of Thingiverse was not mentioned as it is a fairly traditional board game that mimics the stylings of Heroscape. I think that a discussion of this calibre cannot take place without mentioning 2 other helpful resources: 3d Warehouse (once owned by google, now owned by Trimble) and Shapeways (briefly and quickly mentioned at the end of the discussion) a website to purchase 3d printed items from producers if you do not have access to a 3d printer). Otherwise, it was a very good discussion, especially the 3d scanning to printer portion and the acetone finishing.
I think the biggest promise of 3d printing is: 1) Prototyping (which was brought up in great detail by Scott and Don and 2) Upgrading games (or "pimping out") (for example: I am thinking about asking my friend to print some playing pieces from Pocket Tactics for my Rex game to replace the cardboard army pieces).