I was listening to an interview on the radio this evening concerning Google Glasses, a project I have been interested in for a while. During the interview, the Google spokesman mentioned that one potential use is to look at sudoku puzzle, and then be given the option to retrieve the solution.
Clearly if the project can do this, then applying the same technology to chess games should not be far behind. A quick glance at the position on the board, and the best move gets whispered in you ear moments later! No need to hide a phone in your pocket, or make a suspicious number of trips to the toilet.
Of course such a cheating strategy is not as easy as it sounds. Having seen a few prototypes on the web, the design is a bit of a give away. The tiny camera used to record the scene in front of you is not tiny enough, so it should be pretty clear if someone is wearing them. Also you might be able to see random bits of text scrolling across the glasses, and the hand gestures used as part of the control interface run the risk of knocking the pieces off the board.
But as an exercise I would still be interested in seeing chess applications on the finished product. Quite possibly a Google sponsored 'Centaur' (Human+Computer) tournament would be a good PR stunt.