Well 1956 was really something with a gigantic shift in music with the Advent of Rock ‘n’ Roll:
Elvis Presley
Little Richard
Bo Diddley
Carl Perkins
Chuck Berry
Eddie Cochran
Buddy Holly
Everly Brothers
Jerry Lee Lewis
Fats Domino
Or 1977 with the advent of New York New Wave and Punk
Sex Pistols
Stiff Little Fingers
Clash
Blondie
Talking Heads
Ramones
Patti Smith
Television
Buzzcocks
Damned
Ruts
Dead Kennedys
Wayne County
New York Dolls
Can either of those compare with 1967? Or has there been any mega shift and burst of nascent creativity since?