Why should we even let humans obey the orders? Machines can do it more efficienty.
And then why do we need to do it in the physical world? It might be more interesting if there's no gravity, or higher gravity or something.
So the entertainment of the future will involve us seeing computers play video games in front of us.
Humans need to obey the orders because it is easier for the sports fan to relate to humans than to, say, video avatars or robots. In their secret hearts, sport fans actually believe that they're Mo-ron James or whoever is chasing the spheric object around the court at any particular moment, and they pay good money for it. Athletes are not the brightest bunch, neither are coaches, so I heartily welcome any technology that somehow increases the probability of either group being pushed off the gene pool: we can't have your players yet, we'll start with your coaches.
Term, holidays, term, holidays, till we leave school, and then work, work, work till we die. -- C.S. Lewis