Most of the Android apps I use have ads plastered all over them, there's no reason to suppose these glasses will be any different.
I just wonder how long it will be before someone is killed wandering around blindly using these things. As if being "powered" by Google isn't bad enough, the safety implications are quite obvious.
Source: http://www.etechmag.com/2012/06/23/project-glass-googles-glass-act.html