Traditional resume asks people to list their skill and describe the project in a couple sentences. Instead of pretty chart there is a dead simple language percentage count. Instead of rewriting a README it extracts the description from the repo. It's quite useful as a quick resume.
Github's detail page is not useful. It serves merely as an activity dashboard, not a resume for people looking for talent. This goes to the other resume project a month ago a designer showed off his HTML5 skill. That kind of resume burns my eyes and is not useful for recruiter - nobody wants to click/arrow through 20 animates to get your email address. Same thing here in Github.
[1]http://stallman.org/articles/on-hacking.html [2]http://www.mithral.com/~beberg/manifesto.html