The massively popular rock band, and longtime Apple affiliates, were expected to play the event. But they went much further than that by announcing a new album that would be available for free instantly.
Songs of Innocence, U2's 13th album and first in five years, was automatically pushed to over 500 million iTunes accounts via the cloud. iTunes users can access the album for free just by searching their libraries.
Then, to celebrate the release, Cook and Bono did this: