Cell phones may be bringing mobile gaming to a whole new level, but I envision surface computing will result in entirely new modes of social (face to face) gaming.
Imagine your favorite board game -- Monopoly, Risk, Life, Scrabble, whatever -- enabled for surface computing;
-No tiny plastic pieces to loose, to choke children/pets, gum up your fancy robot vacuum, or stab the unsuspecting bare foot;
-No need for a banker (who never seems to have a cash flow problem);
-No worries of spilling drinks (on your vintage, 1st edition Talisman board);
-No worry of clumsy players/pet upsetting the board (right when you were poised to cement your bid for world domination);
-No worry of loosing player position on the board;
-Instructions will be available for all players at any time, even all players at the same time (especially useful for those contentious/strategic rules disagreements);
-Games can be enjoyed for game-play and mechanic, rather than being an exercise in re-learning board setup, sorting/shuffling stacks cards and pieces (battlestar galactica anyone?);
-Multimedia animations, themes/skins, and expansions will offer endless possibilities both as enhancements to the classic games we've been playing for years and for a myriad of yet-to-be-though-of modes of social gaming which surface computing will foster.
Tabletop gaming demo was impressive. Tons of potential. I would absolutely love to see a surface computing setup for Magic the Gathering!