Recently, I have seen a few more digital game tables appear on the radar that are using multi-touch technologies. Multi-touch allows users to interface with a program via pressure sensitive screens that can be manipulated with your fingers.
Check out this wicked application of an Augmented Reality game on a tabletop map. So if anyone was wondering what the hell AR was when I presented the roleplaying applications of it yesterday, this is what I was speaking about.
Looking at the concept of using Augmented Reality for use with tabletop gaming. Think about being able to see your minis animate and do battle, ala Star Wars Dejarik Holochess or never needing to physically look up rules.