Studio recordings and video would vanish overnight. There are large up-front costs involved with record production, and without copyright protection, it’s difficult to impossible to recoup those costs. Musicians who have based their careers on a lot of live performances would probably do about as well as they had been previously; musicians who have based their careers on mega-hit records and record industry promotion would see their careers plummet into obscurity. Movies would probably die altogether, as would the computer software industry.
Books and bookstores would probably last until POD technology made it cheaper to print-on-demand rather than buying. This is still a few years off yet.