Given this paragraph about Mark Arminski, why was he famous and what did he study last while still at school?

Mark Arminski is an American rock concert poster artist born in 1950 in Detroit, Michigan. He began studying art at the Oakland Community College and pursued printmaking in stone lithography at the Kalamazoo Institute of Arts. Rounding out his formal education was his stay at the Dynamic Graphics Education Foundation in Peoria, Illinois, where he studied computer generated art.

Mark Arminski is an American rock concert poster artist.  He finished his formal education studying computer generated art.