I predict that, should we humans manage to keep from blowing up the world, there will one day be games graphically and gameplay-wise good enough that there will be public playthroughs of games that are pay-to-attend events...like movies...but there will be a new class of artists who are sort of like professional game players, whose job it is to provide a visually exciting spectacle for the players by playing so "well" or interestingly that they can provide a new experience for the watchers each time.