The thing that makes watching sports different than listening to a recording or watching a movie is unpredictability.  The spontaneous decisions involved in playing a game are what make every athlete different, and new matchups almost always produce new, interesting results.  Although a lot of the music and performance we're used to experiencing each day is scripted, there are a bunch of improvisational music games and sports that unfold spontaneously.

Becorded and written music is so easy to distribute to large amounts of people, but performing a piece composed on the spot is an exercise in creativity that will never be obsolete.  A lot of people are familiar with Capoeira, the Afro-Brazillian martial art/dance sport-- but did you know that all of the music is improvised?  The leaders of the musicians play instruments called berimbaus and regulate the game.  If a game becomes too aggressive, the berimbau player will step in and direct the participants.  It's kind of like a dance boxing match with drum-playing referees.

Other people have invented games that are totally musical, with minimal physical aspect.  Avant-garde nyc saxophonist John Zorn is well-known for his game piece, "Cobra".  In this video, you can see a man holding up giant cards to prompt the musicians on what will come next.  The results are interesting, though not very hummable.  The whole thing made me laugh-- but it's proof that you can make a game out of anything, and I'd love to try my hand at a round or two.