A report allegedly from sources close to Google states that the company is testing out a new feature to Glass which is letting users to send money using Google Wallet and there's even a reported voice command associated with it OK Glass, send money.
The feature is similar to the one rolled out to Gmail users, so don't be surprised to see a similar feature land on Glass.
Note that that Google takes a 2.9% or $0.30 commission on all Wallet transactions, whichever is higher.