Yea, I believe it is a new competition and he is the first.
The first Mr Olympia was held in 1965 and there are other body building competitions available of which this is the most prestigious. It is not a new sport and this is certainly not the first winner.
Sim_card's statement is only understandable because people in this section are used to talking rubbish and getting paid for it. Arnold has grandchildren and we have to read that the Mr. Olympia is a new competition. As for the winner, I don't know why but I'm not very impressed. I guess we're used to seeing bodybuilders that look like some kind of non-human mutants, so I don't see anything special about this one.