This year marks the centenary of both Vladimir Horowitz and Rudolf Serkin, arguably the two finest concert pianists of the last century. They were contemporaries, but their lives and careers could not have been more divergent, whether in the repertoire they chose or the attitude they brought to the keyboard. Serkin was the conservative, striving for singular perfection in a narrow range of repertoire. Horowitz was the maverick, rarely performing a piece the same way twice, and forever seeking out new challenges and new musical voices. History may not yet be able to determine which man had the greater impact on the world of music, but their joint impact will be felt for years to come.