What does it mean for the Tate to endorse Street Art and the Street for art?

Street Art has, for as long as it has existed, been frowned upon by institutions, the critics disdain it's integrity and art professors grit their teeth at the students who go to art school and practice street art for their work.

The only place street art has had a dominant place in academia is its relation to the social world in humanities; The crime relevance to society and how the media has taken this sub-culture and taken its soul for advertising purposes.

This media trend also relates and somewhat explains the art worlds new acceptance with this art form.