MMS: Massive Multiplayer Spectating

Watching others Play Videogames has become popular. I too find myself enjoying it when friends and family come over to play. Sometimes I would like to jump into the game as a spectator to see it from different angles. I predict in the near-future that Real-time Spectating w/ VR Support will become popular. I can imagine Tournament Games held in Stadium , and Interactive Movies powered by UnrealEngine populated by thousands of Spectators. I think MMS: Massive Multiplayer Spectating going to be huge, whats your opinion?