Quoting Elon Musk:
"As Twitter pursues the goal of elevating citizen journalism, media elite will try everything to stop that from happening."
My definition of citizen journalism— 14 years ago:
"When the people formerly known as the audience employ the press tools they have in their possession to inform one another, that’s citizen journalism."
http://archive.pressthink.org/2008/07/14/a_most_useful_d.html
I still like that definition.
But: that citizen journalism can or should replace the professional kind is a crazy claim.