Committee meetings can help you to collect your thoughts and give you a topographical view of your research. You zoom out from all the nitty gritty and see the lay of the land. You re-establish your frame of reference which is essential to directing your future efforts in a productive way. In anticipation of these types of discussions, I included a master list in my presentation of all the things I needed to do until the date I'm "supposed" to graduate (i.e. four years after I started).
"Things to do in the next 20 months"
There was a problem with the list though...