Rock n' Roll as we know it is only in its' infancy at a mere sixty years old. Very young compared to the 600 year history of Classical music.
How will rock be remembered decades from now? What musicians will stand out above the tens of thousands of others?
I truly believe that The Beatles namely the music of Paul McCartney and John Lennon will stand the test of time. There is an argument for other artists I'm sure...Bob Dylan for one!